Unit 3.3 - Basic Chemistry Test - Comp

What two types of atoms make a covalent bond?

• 2 Nonmetals
• 1 Nonmetal and 1 Metal
• 2 Metals
• 2 Noble Gases

What is a valence electron?

• an electron that is found in the outermost shell of an atom. 
• an electron found in the innermost shell of an atom.
• an electron found in the middle shell.

Predict the bond that will form between Se and Cl.

• Ionic
• Covalent
• Metallic

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The octet rule states that atoms are more stable when they

• have more protons than electrons

• have more electrons than protons

• have a full outer shell

• have a partial outer shell

What is an ion?

• anything that has a positive charge

• atom or group of atoms with a positive or negative charge

• anything with a negative charge

• a group of atoms that can only have a negative charge

What is a covalent bond?

• a bond formed when atoms transfer electrons

• a neutral group of atoms

• a group of atoms with a positive charge

• a chemical bond formed when atoms share electrons

Tags

NGSS.HS-PS1-1

What is an ionic bond?

• a bond formed when atoms transfer electrons

• a chemical bond formed when atoms share electrons

• a group of positive elements

• a group of negative elements

If an atom loses 1 valence electron, what is the charge on the ion?

• -1

• +1

• -7

• +7

If an atom gains 2 electrons, what is the charge on the ion?

• -2

• +2

• -6

• +6

What compound is formed when magnesium combines with fluorine?

(Magnesium + Fluorine)

• MgF

Tags

NGSS.MS-PS1-1