The identity of an element on the periodic table is determined by the number of _______.

• protons

• neutrons

• electrons

• ions

The columns in the periodic table are called

• a metal

• a nonmetal

• a group/family

• a period

The chemical properties of an element are determined by the number of

• energy levels

• valance electrons

• isotopes

• ions

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which element has properties similar to Calcium (Ca)?

• Sodium

• Magnesium

• Potassium

How many neutrons can be found in an atom of Na (Sodium)?

• 12

• 11

• 22.99

• 23

Tags

NGSS.MS-PS1-1

How many protons does Potassium (K) have?

• 39

• 19

• 20

• 39.10

Tags

NGSS.MS-PS1-1

What is the atomic mass of Calcium (Ca)?

• 40.08

• 20

The atomic number of an element increases from left to right across the periodic table.

• True

• False

Tags

NGSS.HS-PS1-1

When an atom gives away an electron it becomes

• an isotope

• a negative ion.

• a positive ion.

• sad.

What subatomic particle is positive and found in the nucleus?

• electron

• proton

• neutron

• quark