Answers
Answer:
Cs
Explanation:
This element is the farthest right, and lowest meaning that the reactivity of it is very high.
1. valence electrons and electronegativity
2. Both reactivity and electronegativity decrease down a group.
3. Electronegativity decreases down a group, and reactivity increases down a group.
4. The number of valence electrons increases from left to right.
5. Cs
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Related Questions
which two particles would be attracted to each other?
Answers
Answer: protons and electrons.
Explanation:
which statement best describes what occurs during a chemical reaction?
a) the bondsman reactants break so that elements can rearrange down form new products
b)bonds within the nucleus of reactants atoms are broken and rearranged to form new product atoms
c) the bonds and products break so that elements can rearrange and form new reactants
d)reactants atoms are destroyed releasing energy which is used to create new product atoms
Answers
Answer:
bonds within the nucleus of reactants atoms are broken and rearranged to form new product atoms
Which sequence is used to separate a soluble salt from a mixture of a soluble and an insoluble
salt?
A
add solvent, heat the mixture, crystallise the mixture
add solvent, heat the mixture, filter, crystallise the filtrate
B
C
heat the mixture, filter, crystallise the filtrate
heat the mixture, filter, add solvent, crystallise the filtrate
D
Answers
What are the Chemical properties of Ethyne
Answers
Answer:
Ethyne is a colourless gas with a characteristic smell. It has a melting point -81oC. It has a boiling point -84oC.
Explanation:
Considering qualitative and quantitative observations, qualitative observations uses numbers and symbols.
True or false?
Answers
Gravity relates to a stream's ability to erode and deposit material by causing water to flow faster down a steep slope. True or False
Answers
Answer:
true
Explanation:
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Answers
Answer:
the second answer
Explanation:
Answer:
A Erosion of structures and buildings
Explanation:
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Answers
Answer:
I believe it's A.
Explanation:
Answer:
option C
Explanation:
There are 2 types of changes
Physical change :- The physical properties are changed and its temporary.Chemical change :- The chemical properties are changed and its permanent.HELPPPPP
50 points
10. Fill in the blanks in the table below about an atom's subatomic particles.
Answers
A. electron, B. Nucleus
Proton is positive charge, electron is negative charge
proton weight, 1 AMU
Unless otherwise instructed, you may refer to the periodic table in the Chemistry: Problems and Solutions book for this question.
Which element belongs to the p-block?
cobalt
oxygen
rubidium
hydrogen
Answers
There is the s,p,d and f blocks, from groups 1-2 that is the s block, 13-18 that’s the p block, 3-12 is the d block and the f would be lanthanide(#57-71) and actinide (#89-103).
Which hybrid orbitals overlap to form the sigma bonds between the indicated atoms in xanthine?
Answers
Many nitrogen and carbon atoms can be found in the structure of a heterocyclic molecule called xanthine, which is present in many biological systems.
The development of a sigma bond between these atoms is an essential component of its binding. A special example is the sigma bond between the nitrogen atom and the neighboring carbon atom. In the context of this sigma bond, the hybridization state of nitrogen can be either [tex]\rm sp^2[/tex]or [tex]\rm sp^3[/tex], and the hybridization state of carbon can be [tex]\rm sp^3[/tex]. A sigma bond is formed when the hybrid orbitals of carbon and nitrogen, which are each [tex]\rm sp^2[/tex] hybridized and [tex]\rm sp^3[/tex] hybridized, overlap. A strong covalent bond can develop when the [tex]\rm sp^2[/tex] hybrid orbitals of nitrogen and carbon line up. This allows electron sharing.
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Equation between Mg and H2O
Answers
Answer:
Mg + 2H2O → Mg(OH)2 + H2, is normally sluggish, but it becomes reasonably rapid when a milled composite of powdered magnesium metal and powdered iron (1−10 mol %) is used with sodium chloride solutions.
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Answers
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1. The equation representing the equation is ~
[tex] \mathrm{Na + Cl\rightarrow NaCl}[/tex]
The given reaction is a redox reaction because there's a transfer of electron from Sodium (Na) to chlorine (Cl)
where sodium is oxidized (due to loss of electron) and chlorine get reduced (due to gain of electron).
2. Sodium is a highly reactive element which belongs to the 1st group of periodic table, hence it can catch fire if it is kept free in atmosphere. so in order to prevent that it is stored in kerosene oil, which doesn't let Sodium come in contact with air .
Metals are good conductors of current.
Answers
Answer:
absolutely correct....................
what is responsible for changes in the state of matter?
and how are
the molecules of a liquid different from that of a solid? PKSS HELOOOÑLPPPP
Answers
Answer:
Temperature and pressure are the two factors which are responsible for change in state of matter.
Solid – In a solid, the attractive forces keep the particles together tightly enough so that the particles do not move past each other. ... In the solid the particles vibrate in place. Liquid – In a liquid, particles will flow or glide over one another, but stay toward the bottom of the container.
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Answers
Answer:
Thanks but I already have a brain LOL.
Your answer is D cooler temperatures.
Melting permisfrost actualy is a source of greenhouse gas because it realeses water which could in turn be vaporized eventualy.
6. Potential energy can be
transformed into kinetic energy
of force is applied to the object.
True or false?
Answers
Answer:
true
Explanation:
because there is love in the universe and we converse in each others mind soul brain time stone
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Answers
Answer:
d
Explanation:
Answer: c
Explanation:
What evidence is there to support the theory that strong nuclear force is greater than electromagnetic force?
A: Electrons are attracted to protons.
B: Protons repel other protons.
C:The nucleus holds the protons together.
D:Protons and neutrons are attracted to each other.
Answers
Answer:
The electromagnetic force is a long range force which acts of charged particles. Like charges repel and unlike charges attract. ... The strong nuclear force is very short range and can only bind adjacent protons and neutrons. The electromagnetic force is long range.
Explanation:
why do we think mercury has so many tremendous cliffs?
Answers
How do anion formation and valence electrons relate?
Answers
Answer:
Atoms gain valence electrons to form anions.
Explanation:
is it true or false when the there are too many protons making the nuclei unstable, it will undergo a positron decay and a proton will turn into a neutron.
Answers
Answer:
True
Explanation:
As the number of protons in the nucleus increases, the number of neutrons needed for a stable nucleus increases even more rapidly.
Which of the following elements has the smallest atomic radius?
Group of answer choices
Nitrogen
Oxygen
Fluorine
Carbon
Answers
Answer:
Fluroine
Explanation:
Answer:
Fluorine
Explanation:
Nitrogen atomic radius: 155 pm
Oxygen atomic radius: 152 pm
Fluorine atomic radius: 147 pm
Carbon atomic radius: 170 pm
Therefore, fluorine has the smallest atomic radius.
A machine increase the rate of doing ______.
Sharp instruments are called ______.
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Answers
Called “ fingerstick”
Each mineral group has a distinctive chemical feature such as
a. oxides are a metal combined with oxygen
b. sulfides are a metal combined with sulfur and oxygen
c. halides are a salt combined with a metallic atom
d. phosphates are made of phosphate polygons
Answers
Answer:
A
Explanation:
What are the most common sources of nitrates that lead to unhealthy water systems
Answers
Answer:
Sources of nitrate that can enter your well include fertilizers, septic systems, animal feedlots, industrial waste, and food processing waste.
Calculate the number of moles of alkali in 25cm3 of NaOH solution used.
Answers
Answer:
0.001mol
Explanation:
volume (NaOH) =25cm³ =0.025dm³
molar volume = 22.4dm³
n = V = 0.025 = 0.001mol
Vm 22.4
Give two other examples each to acidic and basic oxides
Answers
Answer:
Acidic oxide, so², So³, Co², Cl²O7
Basic oxide: CaO, MgO, Na O
Explanation:
An oxide that combines with water to give an acid is termed as an acidic oxide. The oxide that gives a base in water is known as a basic oxide.
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Answers
Answer:
Option a
Explanation:
simple
Answer:
The two solutions do not react with each other unless the water is boiled off, then the two will decompose.
Explanation:
What reasons did the Pilgrims give for creating the Mayflower Compact?
to create a colony, establish a new church, and provide a long life for their children
to organize a new nation and create order, and for financial gain
to organize themselves, guarantee a long life for the colony, and achieve their goals in setting up the colony
“[To] Combine ourselves together into a Civil Body Politic, for our better ordering and preservation and furtherance of the ends aforesaid”
—Mayflower Compact
Answers
Answer:
To organize a new nation and create order and for financial gain.
Answer:
C the person above is wrong its
Explanation:
to organize themselves, guarantee a long life for the colony, and achieve their goals in setting up the colony
Explanation: