Chemical Reactivity

What determines an element's chemical reactivity?

• protons

• electrons

• neutrons

• valence electrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Identify number 16 on the periodic table square below.

• atomic mass

• element name

• chemical symbol

• atomic number

Identify number 17 on the periodic table square below.

• atomic mass

• atomic number

• chemical symbol

• element name

Tags

NGSS.MS-PS1-1

How many valence electrons are found in atoms of group 14?

• 4
• 3
• 14
• 16

Tags

NGSS.HS-PS1-1

Which group has the greatest number of valence electrons?

• 1
• 14
• 18
• 16

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many valence electrons are found in atoms of group 1?

• 7
• 6
• 4
• 1

All atoms are most stable with (or would "prefer") how many electrons in their valence shell?

• 1

• 2

• 8

• 18

Tags

NGSS.MS-PS1-1

Beryllium is in group number______.

• Group 2
• Group 3
• Group 4
• Group 7

What correctly describes the nucleus of an atom?

• protons and electrons
• neutrons and electrons
• neutrons and protons
• protons, electrons, and neutrons

Tags

NGSS.MS-PS1-1

The outer most negatively charged particles of an atom are known as what?

• electrons
• protons
• neutrons
• valance electrons