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Review of Matter and Atoms

Study Slideshow

A neutral atom of lead has 82 protons, how many electrons does it have?

82

15

Sodium has 11 neutrons, 12 protons, and 11 electrons. What is its mass?

23

15

Which statement best describes an electron?

Greater mass than a proton and a negative charge

Smaller mass than a proton and a positive charge

Smaller mass than a proton and a negative charge

Greater mass than a proton and a positive charge

15

Most of the mass in an atom is concentrated in the

Electron Cloud

Protons

Empty space

Nucleus

15

The second energy level can hold up to how many electrons?

8

15

How many protons does this element have?

7

15

What is the atomic mass of lead?

207.2

15

How many neutrons are in an atom of gold?

118

15

How many electrons are in an atom of silver?

47

15

The ____________ is an abbreviation for the element's name

symbol

15

Melting an ice cube to get liquid water

Chemical Change

Physical Change

15

Rolling a ball of clay into a long straight line

Physical Change

Chemical Change

15

Gases created when baking soda and vinegar are mixed

Physical Change

Chemical Change

15

A bar of chocolate melting in the sun

Physical Change

Chemical Change

15

Baking cookies

Chemical Change

Physical Change

15

Grinding coffee beans

Physical Change

Chemical Change

15