Chemistry Quiz

A group of atoms bonded together is called a __________.

• compound

• ion

• energy level

• valence electron

Tags

NGSS.MS-PS1-1

Layers in the electron cloud where electrons exist are known as __________.

• energy levels

• ions

• molecules

• covalent bonds

Tags

NGSS.HS-PS1-1

Bonds formed by the transfer of electrons are known as __________.

• ionic

• covalent

• molecule

• energy levels

Which of the following statements about valence electrons is NOT true?

• Valence electrons create balanced charges.

• Valence electrons cause atoms to be reactive and unstable.

• The valence energy level cannot hold more than eight electrons.

• Elements want to achieve stability by completing their valence energy level.

Bonds form because atoms are seeking _____________.

• protons

• a reaction

• stability

• a friend

Covalent bonds are formed between _______________.

• atoms of nonmetals

• atoms of metals

• atoms of a metal and a nonmetal

• all of the above

What type of bond is formed when Na gives up its electron to Cl?

• Covalent bond

• Ionic bond

• Metallic bond

• Hydrogen bond

Tags

NGSS.MS-PS1-5

What happens to Na when it gives up an electron to Cl?

• It becomes a neutral atom

• It becomes a Na+ ion

• It becomes a Cl- ion

• It gains an electron

Tags

NGSS.MS-PS1-5

What is the charge on Cl after it gains an electron from Na?

• Positive

• Neutral

• Negative

• Double positive

What is the main reason atoms form bonds?

• To become larger

• To become stable

• To become unstable

• To become smaller