Biology, 28.05.2020 22:59 hokamidat

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Fill in the blank: The number of molecules in a chemical reaction are indicated by the

The on the left side of an equation must be balanced with the atoms on the right side of the equation.
Question 2 options:

total number of molecules

total number of atoms

total number of compounds

free electrons

What happens in a covalent bond between atoms?
Question 3 options:

each atom shares electrons so that they are both stable

electrons are lost by one atom and gained by the other

the smaller atom’s neutrons repel the electrons

the electrons flow in an electric current away from the bonded pair of atoms

(4) Fill in the blank: What is the correct name for the ionic compound Ca2P5?

What does a chemical change always result in?
Question 5 options:

precipitate

new reactant

increased activation energy

new substance

Metals tend to electrons and become .
Question 6 options:

lose, anions

lose, cations

gain, anions

gain, cations

How many valence electrons do most atoms need to have in their outer shell to be most stable?
Question 7 options:

8

1

4

6

Answers: 1

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