unit 2 review chem

A neutral atom may contain 8 protons, 9 neutrons, and how many electrons?

• 9 electrons

• 8 electrons

• 10 electrons

• 11 electrons

Tags

NGSS.HS-PS1-1

You can determine the identity of an element if you know how many __________ it has.

• electrons

• neutrons

• energy levels

• atoms

• protons

Tags

NGSS.HS-PS1-1

The nucleus of an atom has all of the following characteristics EXCEPT that it:

• is positively charged.

• contains nearly all of the atom’s mass.

• is very dense.

• contains nearly all of the atom’s volume.

The element boron has two naturally occurring isotopes – one with an atomic mass of 10.01 and another with an atomic mass of 11.01. Which is the most abundant isotope?

• The one with an atomic mass of 10.01.

• The one with an atomic mass of 11.01.

• They are both equally as abundant.

• Not enough information is provided to answer this.

An element with 5 protons, 6 neutrons, and 8 electrons has an atomic number of ____.

• 5

• 6

• 8

• 11

Tags

NGSS.MS-PS1-1

An element with 5 protons, 6 neutrons, and 8 electrons has a mass number of ______.

• 5

• 6

• 8

• 11

How many valence electrons does an atom of magnesium typically have?

• 2

• 3

• 12

• 24

Tags

NGSS.HS-PS1-1

How many valence electrons does an atom of aluminum typically have?

• 2

• 3

• 13

• 27

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The name of the force that is able to overcome the repulsive force between protons in an atom is the _______.

• weak nuclear force

• strong atomic force

• strong nuclear force

• electromagnetic force

The number of energy levels an atom will have is based on the number of ________ it has.

• protons

• neutrons

• electrons

• quarks