Atoms & The Periodic Table

These particles orbit around the nucleus of an atom.  What are they called?

• electrons
• protons
• neutrons

Tags

NGSS.HS-PS1-1

How many neutrons are in the atom "K"?

• 19

• 1

• 39
• 20

Tags

NGSS.MS-PS1-1

How many valence electrons does Iodine Have?

• 6
• 16
• 7
• 17

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What's a valence electron?

• electrons in the outermost energy level
• the atomic number
• electrons in the first level

Tags

NGSS.MS-PS1-1

How many total electrons does Aluminum (Al) have?

• 27

• 14

• 13

• 3

How many total electrons does Silicon have? 

• 14

• 28

• 2

• 4

Tags

NGSS.MS-PS1-1

Most of the mass in an atom is made up of _____________________?

• protons and electrons
• protons and neutrons
• neutrons and electrons
• electrons and quarks

Tags

NGSS.MS-PS1-1

Group 17 (halogens) have ____ valence electrons.

• 4
• 5
• 6
• 7

Tags

NGSS.HS-PS1-1

Each vertical column in the periodic table is called a 

• period
• group or family
• cluster

Which group of the periodic table is composed of inert (unreactive)  elements?

• alkali metals
• halogens
• noble gases