Answer:
Atomic radii vary in a predictable way across the periodic table. As can be seen in the figures below, the atomic radius increases from top to bottom in a group, and decreases from left to right across a period. Thus, helium is the smallest element, and francium is the largest.
The He or helium is a smallest element and the Fr or the francium is largest.
What is the atomic radius ?The atomic radius is a chemical element and is a measure of the atomic size. It typical distance from the center of the nucleus is bounded by the electron shells.
The atomic radii can vary on basis of the periodic table. Hence can be seen as the radius increases from top to the bottom in a group, and then decreases from left to the right across a period.
Find out more information about the atomic radius.
brainly.com/question/1445177.
Match the element with its description. Match Term Definition Sodium A) Has properties of both metals and nonmetals Silicon B) Highly reactive gas Bromine C) Malleable, soft, and shiny Argon D) Nonreactive gas
Answer:
Sodium - malleable, soft, and shiny
Silicon - has properties of both metals and nonmetals
Bromine - highly reactive gas
Argon - non-reactive gas
Explanation:
Sodium is an alkaline metal. Just like other alkaline metals, it's malleable, soft, and shiny.
Silicon is a metalloid. Metalloids are elements that have properties of both metals and nonmetals.
Bromine a highly reactive chemical element. It is a fuming red-brown liquid at room temperature that evaporates to form a similarly coloured gas.
Argon is a noble gas. Just like other noble gases, it's non-reactive.
Which of the following is NOT naturally found as a diatomic
gas?
O Chlorine
O Neon
O Oxygen
O Nitrogen
O Hydrogen
Answer:
Neon
Explanation:
Choose all the answers that apply.
Electricity
can be created by moving magnets through a coll of copper wire.
can be used to create a magnetic field.
is caused by moving protons.
flows from negative to positive.
is created by the movement of electrons.
Answer:
can be created by moving magnets through a coll of copper wire.
can be used to create a magnetic field.
flows from negative to positive.
is created by the movement of electrons.
Explanation:
what oh yes but no? so yes if no but but no yes then no?
Answer:
ummmm id say god bless you :P
Explanation:
N2 + 3 H2 --> 2 NH3
The balanced equation above indicates that if 2 moles of N2 react, then
2 moles of H2 will also react
3 moles of H2 will also react
4 moles of NH3 will be produced
2 moles of NH3 will be produced
Answer:
4 moles of NH3 will be produced
Explanation:
The reaction expression is given as:
N₂ + 3H₂ → 2NH₃
We have to check that the equation of the reaction is balanced.
Then;
if 2 mole of N₂ reacts;
1 mole of N₂ will react with 3 mole of H₂ to produce 2 mole of NH₃
2 mole of N₂ will react with (2x3)mole of H₂ to produce (2x2)mole of NH₃
6mole of H₂ to produce 4 mole of NH₃
Answer:
According to the balanced chemical equation N2 + 3 H2 --> 2 NH3, for every 1 mole of N2 that reacts, 3 moles of H2 are required to react completely to form 2 moles of NH3. Therefore, if 2 moles of N2 react, then 6 moles of H2 will also react to form 4 moles of NH3.
So the correct answer is: 6 moles of H2 will also react, and 4 moles of NH3 will be produced.
Explanation:
define Nuclear Fission with an example of it
Answer:
Fission is the splitting of an atomic nucleus into two or more lighter nuclei accompanied by energy release. ... The energy released by nuclear fission is considerable. For example, the fission of one kilogram of uranium releases as much energy as burning around four billion kilograms of coal
Explanation:
In addition to having a blue color, what other characteristic do Neptune and Uranus share?
no rings
27 moons
no axis tilt
cold temperatures
Answer:
no rings
Explanation:
Answer:
d: cold temperatures
Explanation:
What is the ratio of the side lengths on polygon FGHIJ to the corresponding side lengths on polygon ABCDE? Enter the ratio in the table. How does this ratio relate to the scale factor of the dilation?
Explanation:
this is the exact answer!!
Answer:
The ratio of the side lengths on FGHIJ to the corresponding side lengths on ABCDE is 1 : 2. The scale factor of the dilation that takes the size of ABCDE to the size of FGHIJ is 0.5. The ratio of corresponding side lengths is equal to the scale factor of dilation.
Ratio: 1:2
Explanation:
PLATO
the ratio is 1:2 all the way down for all 5 sections of the side lengths
Given the nuclear equation: 19Ne → X + 19F What particle is represented by X?
alpha
beta
neutron
positron
Answer:
Beta
Explanation:
Answer:
Positron
Explanation:
Castle learning
What is another name we use to refer to "energy levels"?
Answer:
Energy state
Explanation:
Two or more substances mingled together, but not chemically combined are known as a ?
Answer:
hdhdjsusjgsusnsmmdmdjsggwgebdubdudhdbr dhfbbdurbsbbdbdhdbd hdbdbvdbbdbd
Answer:
mixture of a material made up of two or more different substances, which are mixed but not combined chemically are retained
The
percent yield for the reaction in which 15.6 g of aluminum
hydroxide is reacted in excess hydrogen chloride gas is 92.5
%. What is the actual yield of aluminum chloride?
Answer:
24.6
Explanation:
Which substance is most likely metallic
The substance which is most likely metallic is that with least number of valence electrons according to electronic configuration.
What is electronic configuration?
Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.
Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.
Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.
Learn more about electronic configuration,here:
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Calculate the energy of a photon of radiation with a wavelength of 6.4 x 10-5 m.
Answer:
The energy is
=
3.11
⋅
10
−
19
J
Explanation:
i hope this helps
Add 2 teaspoons of baking soda and 2 teaspoons of citric acid to the foam cup. Add the half cup of water to the cup and stir. Is a chemical reaction taking place? How do you know?
Answer:
Yes a chemical reaction is taking place
Explanation:
In this cooking procedure, a chemical reaction is taking place because the citric acid and the baking soda are both chemical species combining together.
At the end a new produce is formed. It is accompanied by a release of heatThe stirring helps to increase the rate of chemical reaction between the citric acid and baking sodaAnswer:
The temperature for it is between 50-55 degrees
Explanation:
Chemists want to place 2 x 10^24 atoms of carbon in a chemical reaction. How would they obtain this amount?
Answer:
Explanation:
To determine what is been asked in this question, firstly, the formula to determine the number of atoms present in a substance must be used. The formula is
number of atoms = n × 6.02 × 10²³
where n is the number of moles
6.02 × 10²³ is avogadro's number
The number of atoms needed (to be present) has already been provided in the question as 2 × 10²⁴
Thus;
2 × 10²⁴ = n × 6.02 × 10²³
n = 2 × 10²⁴ ÷ 6.02 × 10²³
n = 3.32
The number of moles of carbon that will be placed in the reaction will be 3.32 but to determine the amount/mass of carbon that will be used in the reaction, we will use the formula
n = mass/molar mass
The molar mass of carbon is 12 g/mol
Thus;
3.32 = mass/12
mass = 3.32 × 12
mass = 39.84 g
The mass of carbon that will be required for the reaction will be 39.84, the procedure above shows how to obtain this amount.
PLZ HELP!! WILL GIVE BRAINLIEST
Two students made the Lewis dot diagrams of H2O. The diagrams are as shown.
Two visual diagrams of an H two O molecule are shown. Student As diagram on the left has oxygen at the center and connects with two hydrogen atoms by way of straight lines. There are two pairs of dots above the oxygen atom. Student Bs diagram is identical except it has one pair of dots and instead of lines, and it has an arrow between the oxygen and each hydrogen.
Which student drew the correct Lewis dot diagram?
Only Student A
Only Student B
Both Student A and Student B
Neither Student A nor Student B
Answer:
It is only student A
Explanation:
I just took the quiz and got a 100% good luck to whever is reading this.
Student A has drew the correct Lewis dot diagram.
What is Lewis Structure?The valence shell electrons in a molecule are depicted in an extremely simplified manner by a Lewis Structure. It is used to demonstrate how the electrons in a molecule are positioned around particular atoms.
Electrons are shown as "dots" or, in the case of a bond, as a line connecting the two atoms. The octet rule and formal charges must be met in order to achieve the "optimal" electron configuration.
Lewis electron dot structures, Lewis dot diagrams, and electron dot structures are a few names for Lewis structures. All of these titles allude to the same type of diagram that is used to depict the positions of bonds and electron pairs.
Therefore, Student A has drew the correct Lewis dot diagram.
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Which of the following was not used as evidence to support
continental drift?
A. Continents fitting like puzzle pieces
B. Comparison of regional monsoon variability
C. Similar fossilized organisms found throughout each continent
D. Matching bedrock in Africa and South America
Answer:
B.
Explanation:
Lol notes brought everything but B. Up
According to newtons first law of motion, which of the following objects will change its motion?
2) A gas takes up a volume of 15 liters, has a pressure of 3.3 atm, and a temperature of
299 K. If I raise the temperature to 350 K and lower the pressure to 1050 mmHg, what is the
new volume of the gas?
3) A gas that has a volume of 28 liters, a temperature of 65 °C, and an unknown pressure
has its volume increased to 36 liters and its temperature decreased to 35 °C. If I measure the
pressure after the change to be 2.0 atm, what was the original pressure of the gas?
work too pls !!! thank you so much !!!
Answer:
Explanation:
[tex]\frac{P1V1}{T} = \frac{P2V2}{T2} = \frac{3.3 *15}{299} = \frac{1050*V}{760*350}[/tex]
v= 41.9 L
b) using the same formula as above [tex]P1= \frac{P2V2*T1}{T2 * V1}= \frac{36*2*338}{308*28} = 2.8 atm[/tex]
hope it helps
Please help me
What type of action is happening to location B?
Group of answer choices
subduction
divergent
convection
conduction
Answer:
divergent
Explanation:
I believe it is divergent.
How many atoms of oxygen are in the following compound? Ba3(PO4)2
Answer: 8 atmos
Explanation: In one formula unit of barium phosphate there are 3 atoms of barium (Ba) (2)(1) = 2 atoms of phosphorus (P) (2)(4) = 8 atoms of oxygen (O).
What would you expect the charge on a bromide ion to be? Why?
The Element Bromine belongs to the 7th group "THE HALOGENS" in the periodic table. The general oxidation number of the Halogens is -1 thus Charge on bromide ion is expected to be -1.
______________________________________In the liquid, there are hydrogen bonds that form between molecules of water and covalent bonds that form between hydrogen and oxygen within a water molecule. Which statement(s) are true about When water is boiling, which statement(s) are true?
a) The covalent bonds between hydrogen and oxygen are broken.
b) The hydrogen bonds between water molecules are broken.
c) both are true
d) neither are true
Answer:
c
Explanation:
Which best describes the difference between radiation and conduction? (1 point)
A.) Conduction cannot happen when both objects are solids.
B.)
Conduction requires two objects to be in physical contact.
C.)
Conduction can occur between two objects that are very far apart.
D.)
Conduction decreases the movement of the atoms in both objects.
Answer:
B) Conduction requires two objects to be in physical contact.
Explanation:
Conduction is when two objects are directly touching each other. So, the objects must come in physical contact with each other.
The area of a square is 200 cm2. What is an
estimation of its side?
a) 20 cm
C) 14 cm
b) 10 cm
d 50 cm
Answer:
14cm
Explanation:
s x s=area
s²=200cm²
s=14.1421356237cm
s=14cm
Is a hydrogen bond a true chemical bond?
Answer:
A hydrogen bond is the electromagnetic attraction created between a partially positively charged hydrogen atom attached to a highly electronegative atom and another nearby electronegative atom. A hydrogen bond is a type of dipole-dipole interaction; it is not a true chemical bond.
Explanation:
A 20 ml solution of sugar with a concentration of
1.0M is diluted to 120 mL, what is the new
concentration?
Answer:
M₂ = 0.16 M
Explanation:
Given data:
Initial volume of solution = 20 mL
Initial concentration = 1.0 M
Final volume = 120 mL
Final/new concentration = ?
Solution:
Formula:
M₁V₁ = M₂V₂
by putting values,
1.0 M × 20 mL = M₂ × 120 mL
M₂ = 1.0 M × 20 mL / 120 mL
M₂ = 20 M.mL /120 mL
M₂ = 0.16 M
12. What is the smallest particle that can be called an element?
Answer:
Atom
Explanation:
Answer:
atom
Explanation:
oof its atom but i need 2p characters
Hydrogen is converted to helium within the Sun through a process called...
Answer:
nuclear fusion
Explanation: