CHEMISTRY HIGH SCHOOL

When metals form ions, they tend to do so by what

Answers

Answer 1
Answer: Losing electrons and forming positive ions
Answer 2
Answer: Metals need to give away atoms. Therefore, they tend to give away atoms and become positively charged ions. They're called 'cations' when they become positive. 

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Atoms gain or lose electrons to increase:a. reactivityc. stabilityb. nucleus sized. atomic mass

Group 1a elements have _________ electron(s) in their valence shell. a. 1
b. 2
c. 4
d. 8

Answers

Answer:

a. 1

Explanation:

As you know the group 1A elements are also called the Alkali metals and are highly reactive metals because they have only one electron in their valence shell, this means that all prior levels are full and stable, and they have only one electron in the upper level of the valence shell and it is ready to react with any element that is close to it.
a. 1

The number of valance electrons an element has is determined based on the group they are in.

Describe two human activities that can affect the water cycle.

Answers

Water pollution and global warming
deforestation....trees release water vapour..with the trees being cut down less water vapour is being released..
consuming the water.... we use up water for drinking and for our homes etc...
hope this helps!

Order the following in terms of increasing radius:

Al, In, TI, B, Ga

Answers

Answer: B, Al, Ga, In, Tl



Explanation:

Substances made of two or more elements which are not chemically bonded are known as

Answers

Substances that are not chemically bonded are mixtures.

The net energy released or absorbed during a reversible chemical reaction is equal to(1) the activation energy of the endothermic reaction
(2) the activation energy of the exothermic reaction
(3) the difference between the potential energy of the products and the potential energy of the reactants
(4) the sum of the potential energy of the products and the potential energy of the reactants

Answers

Answer: The correct answer is Option 3.

Explanation:

The net energy absorbed or released in a reaction is known as total enthalpy change of the reaction. It is designated as \Delta H_(rxn)

It is defined as the difference between the total potential energy of the products and the total potential energy of the reactants. The equation for this is given by:

\Delta H_(rxn)=\sum \Delta H_(products)-\sum \Delta H_(reactants)

where,

\Delta H_(products) = Total potential energy of the products

\Delta H_(reactants) = Total potential energy of the reactants

Hence, the correct answer is Option 3.
3. The difference between the potential energy of the products and the potential energy of reactants.

How to figure out if compounds are electrolytes

Answers

An electrolyte is a compound that dissolved into its ions when placed into a solvent such as water (the ions can carry an electric charge). An easy way to test whether something is an electrolyte is by placing the substance in Deionized water and testing if the resulting solution can carry a current. If the resulting solution can carry a current, the substance is an electrolyte. I hope this helps. Let me know if anything is unclear.
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