UNIT 2 - Review

A neutral atom may contain 8 protons. Which of the following is true?

• 9 neutrons and 10 electrons.

• 9 neutrons and 8 electrons.

• 8 neutrons and 10 electrons.

• 10 neutrons and 9 electrons.

Tags

NGSS.MS-PS1-1

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

• protons

• neutrons

• electrons

• energy levels

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.

Tags

NGSS.HS-PS1-8

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. Given the information provided on the periodic table, which do you think 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.

Tags

NGSS.HS-PS1-8

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

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

Tags

NGSS.HS-PS1-8

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

• protons

• neutrons

• electrons

• quarks