SOL Review #9

What are the smallest building blocks of an element that have all the properties of that element?

• electrons

• atoms

• protons

• neutrons

Sodium is found in table salt. It contains 11 protons and 12 neutrons. How many electrons are found in a neutral atom?

• 1

• 11

• 12

• 23

Tags

NGSS.MS-PS1-1

Which of the following is NOT part of Rutherford's model of the atom?

• Atoms are mostly empty space

• The nucleus is in the center of the atom

• The nucleus as a positive charge

• Electrons are found in a cloud around the nucleus

Which scientist said that electrons are found in distinct energy levels in an atom?

• Bohr

• Dalton

• Rutherford

• Thomson

A substance that forms when two or more elements join chemically is -

• a solution

• a compound

• a mixture

• an atom

A student put sawdust and iron filings into a beaker and stirred them. What did the student make?

• a homogeneous mixture

• a compound

• a heterogeneous mixture

• a solution

In which of the following are all the atoms the same?

• a homogeneous mixture

• a solution

• a compound

• an element

A solution that is evenly distributed so that the separate pieces cannot be seen even with a light microscope

• a homogeneous mixture

• an element

• a compound

• a heterogeneous mixture

Tags

NGSS.MS-PS1-2

How many protons does an atom of the element shown have?

• 19

• 39

• 20

• 18

Tags

NGSS.MS-PS1-1

How many neutrons does the average atom of Potassium have?

• 19

• 20

• 18

• 39

Tags

NGSS.MS-PS1-1