Millie's Chemistry Review #1

Isotopes of an element have the same number of _______, but different numbers of _________.

• neutrons

  protons

• protons

  neutrons

• protons

  electrons

• electrons

  protons

11) Which states of matter are significantly compressible?

• A) gases only

• B) liquids only

• C) solids only

• D) liquids and gases

• E) solids and liquids

How many sig. fig. are in the number below:
0.056

• 1
• 2
• 3
• 4

What percentage of the total atomic mass of magnesium bromide (MgBr₂) is composed of bromine? Hint - consider the mass of both atoms of bromine in your calculation.

• 13%

• 43%

• 63%

• 87%

Write the electronic configuration of carbon atom.

• 1s² 2s² 2p⁶

• 1s² 2s² 2p²

• 1s¹ 2s¹ 2p⁴

Write the electronic configuration of copper atom.

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁹

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d¹⁰

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁴

Write the electronic configuration of neon atom.

• 1s² 2s² 2p⁶

• 1s² 2s¹ 2p⁵ 3s²

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁴

2NaF + Br₂ --> 2NaBr + F₂

How many grams of NaBr are produced in the equation above?

(Na=23, F=18.9, Br=79.9)

• 205.8 g

• 41.9 g

• 83.8 g

• 102.9

7. The amount of product that actually forms when a chemical reaction is carried out in a laboratory is called the _________ yield.

• actual
• theoretical
• percent

Which of the following is not named correctly?

• KNO₃ - potassium nitrate

• FeCl₃ - iron (III) chloride

• Na₂O - disodium oxide

• SF₆ - sulfur hexafluoride