Atomic Structure and Chemical Bonds

At the center of the atom is a nucleus containing...

• molecules

• electrons

• neutrons and electrons

• protons and neutrons

When an atom gains an electron and becomes negatively charged, it is called a(n)...

• negative ion

• electron

• positive ion

• molecule

A noble gas has...

• an ionic bond

• no nucleus

• a stable outer energy level

• twice as many electrons as protons

A molecule consisting of two hydrogen atoms joined in a covalent bond would be written as...

• HO₂

• HS₂

• H₂

• H₂O

Tags

NGSS.MS-PS1-1

For an atom of an element to be neutral, the number of _____ is always the same.

• ions and electrons

• protons and electrons

• neutrons and protons

• atoms and molecules

What is the maximum number of electrons in the second energy level?

• 8

• 16

• 18

• 32

What is the name of the Group 1 family of elements?

• halogens

• noble gases

• alkali metals

• alkaline earth metals

Potassium is in Group 1. How many electrons does it need to gain or lose to become stable?

• gain 1

• lose 1

• gain 2

• lose 2

A sodium atom that is positively charged is written as...

• Na-

• Na+

• S-

• S+

The bond that forms between atoms that share electrons is called a(n) _____ bond.

• ionic

• covalent

• atomic

• shared

Tags

NGSS.HS-PS1-1