Science

How many valence electrons does Lithium have?

• 1
• 2
• 3
• 4

How many valence electrons does magnesium have?

• 1
• 2
• 12
• 24

Tags

NGSS.HS-PS1-1

How many valence electrons does Carbon have?

• 4
• 12
• 6
• 14

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many valence electrons does Neon have?

• 18
• 8
• 10
• 2

Tags

NGSS.HS-PS1-1

Sodium has an atomic number of 11, how many protons does this atom have?

• 22
• 11
• 12
• 2

Tags

NGSS.MS-PS1-1

What number on the element key tells you how many protons an element has?

• Atomic Mass
• Element name
• Atomic number
• Element Symbol

The following element key shows how many protons?

• 16
• 15.999
• Oxygen
• 8

Which of the following statements most directly relates to Chlorine's reactivity?

• Chlorine atoms have 17 protons in their nucleus
• The average mass of a chlorine atom is 35
• Chlorine atoms have 3 energy levels
• Chlorine atoms have 7 valence electrons

Which of the following determines the identity of an element?

• Atomic Number
• Atomic Mass
• Valence Electrons
• Number of Neutrons

Tags

NGSS.MS-PS1-1

What is Reactivity?

• The characteristics of a substance that can be observed without changing the identity of the substance.
• A property making a substance react with certain substances
• When a substance combines with another to form a new substance.
• I really don't know at all.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5