Atoms Reactivity

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

• 4
• 3
• 14
• 16

Which group has the greatest number of valence electrons?

• 1
• 14
• 18
• 16

How many valence electrons are found in atoms of group 15?

• 4
• 5
• 2
• 3

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

• 7
• 6
• 4
• 1

What are valence electrons?

• The total number of electrons in an atom

• The number of electrons in the outermost shell

• The number of electrons in the second shell

• The number of protons in the outermost shell

Which elements have the most similar chemical properties?

• boron and carbon

• oxygen and sulfur

• aluminum and bromine

• argon and silicon

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

• 1

• 2

• 8

• 18

Valence electrons are: 

• Electrons farthest away from the nucleus
• Electrons closest to the nucleus
• Electrons that just come and go - they don't stay with the atom
• Electrons in the second shell

When trying to identify an unknown element, a scientist determines what other elements reacts with chemically. Which property of the unknown element determines the other element it reacts with?

• The total number of neutrons in the unknown element

• The total number of particles in the nucleus of the unknown element

• The number of protons in the nucleus of the unknown element

• The number of valence electrons in the unknown element

Tags

NGSS.MS-PS1-2

What groups are the most reactive metals?

• 2 and 3

• 1 and 18

• 1 and 2

• 16 and 17