Chpt 2 Pre Quiz

Atoms have no electric charge because they have ________.

• uncharged neutrons in their nuclei

• an equal number of protons and neutrons

• an equal number of protons and electrons

• an equal number of charged and uncharged subatomic particles

Tags

NGSS.HS-PS1-7

To find out the number of neutrons in an atom, we need to know the following.

• atomic number

• electron number

• mass number

• mass number and atomic number

Which of the following indirectly determines the bonds that an atom can form?

• protons

• neutrons

• electrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

A(n) _________ occurs when one atom steals an electron from another atom.

• ionic bond

• covalent bond

• hydrogen bond

Tags

NGSS.HS-PS1-3

A compound is made up of the same type of element.

• true

• false

How is a covalent bond formed?

• two atoms share two pairs of electrons

• two atoms share two electrons

• two atoms share one electron

• one atom loses a pair of electrons to the other

Which of the following is true of oxygen that has 8 protons, 8 neutrons, and 8 electrons?

• It has a charge of +8

• It has a mass number of 8.

• It has an atomic number of 8.

• It has atomic number of 16.

Tags

NGSS.MS-PS1-1

How many electrons participate in a triple covalent bond?

• 3

• 6

• 9

• 12

What are the four most abundant elements found in living systems?

• carbon, hydrogen, oxygen, and nitrogen

• calcium, hydrogen, oxygen, and nitrogen

• carbon dioxide, hydrogen, oxygen, and nitrogen

• carbon, sulfur, oxygen, and nitrogen

Van der Waals interactions may result under which of the following conditions?

• electrons are not symmetrically distributed in a molecule

• molecules held by ionic bonds react with water

• two polar covalent bonds react

• a hydrogen atom loses an electron