Atoms & Chemistry Review

Which of the following is described as the basic unit of matter?

• Element
• Atom
• Molecule
• Compound

Tags

NGSS.HS-PS1-7

In the atom diagram shown, E is pointing to

• An electron
• a proton
• a neutron
• the nucleus

Tags

NGSS.MS-PS1-1

B and C are found in the ______ of an atom.

• electron cloud
• Space
• Nucleus
• Outside

Tags

NGSS.MS-PS1-1

What charge does an electron have?

• Negative
• Positive
• Neutral
• Contrated

In this chemical equation, the elements in red are the_______.

• Products

• Reactants

• Subscripts

• Coefficients

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is a valence electron?

• an electron that is found in the outermost orbital of an atom. 
• an electron found in the innermost orbital of an atom.
• an electron found in the middle orbital.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Using the information provided, determine how many electrons the a Boron atom contains.

• 2.5

• 5

• 6

• 10.81

Tags

NGSS.MS-PS1-1

Which of the following is NOT true about the periodic table?

• Atomic mass is equal to the number of neutrons.

• Elements listed by their (increasing) atomic mass.

• Groups are the elements listed in columns.

• Periods are the elements listed in rows of 8 (for most rows).

Chemical properties are

• an element’s ability to react with other elements.

• an element's ability to change into a gas.

• an elements attraction to water.

• any property which can be observed or measured.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

A physical reaction is a chemical reaction which

• changes the physical properties of the elements.

• changes the chemical properties of an element.

• separates atoms in a mixture.

• combines atoms in a mixture.