Chemistry End of Course Review

Two solutions are mixed together. A column of smoke is formed. This is an example of a ---

• physical property

• chemical property

• physical change

• chemical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which is considered an intensive property?

• Boiling point

• Mass

• Volume

• Length

Substances with an indefinite shape and definite volume are in which state of matter?

• Solid

• Liquid

• Gas

• No state of matter fits this description

A student pours salt water into a beaker and boils it. After some time, only salt is left in the beaker. What conclusion can the student make?

• The salt water is a pure substance because its density remained constant.

• The salt water is a mixture because it looked uniform before being boiled.

• The salt water is a pure substance because it had a set boiling point.

• The salt water is a mixture because it left salt in the beaker when boiled.

What family on the Periodic Table is most reactive nonmetals?

• Group 1

• Group 12

• Group 13

• Group 17

Which statement most accurately describes the elements in Group 16 of the periodic table if going from top to bottom?

• Atomic radii decreases and ionization energy increases.

• Atomic radii increases and ionization energy decreases.

• Atomic radii decreases and ionization energy decreases.

• Atomic radii increases and ionization energy increases.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

An unknown element labeled as Element X is found to contain 72.15% of isotope type 1 (84.9118 amu) and 27.85% of isotope type 2 (86.9092 amu). What is the average atomic mass?

• 85.13 amu

• 85.47 amu

• 86.21 amu

• 86.49 amu

When drawing the Lewis valence dot structure, how many "dots" would Oxygen have?

• 3

• 4

• 5

• 6

What is the identity of the element with the following electron configuration:

1s² 2s² 2p⁶ 3s² 3p³

• Nitrogen

• Magnesium

• Phosphorous

• Chlorine

Tags

NGSS.MS-PS1-1

Which of the following is a possible compound formed from Be⁺² and NO₃ ^-1

• Be₂NO₃

• Be(NO₃)₂

• Be₃(NO₂)

• BeNO

Tags

NGSS.MS-PS1-1