Naming, Percent Composition, Matter, Atoms

Naming, Percent Composition, Matter, Atoms

Multiple Choice

If carbon-12 had one less proton, it would become...

• boron-11

• nitrogen-11

• carbon-11

• carbon-13

Multiple Choice

If carbon-12 had one less neutron, it would become...

• boron-11

• nitrogen-11

• carbon-11

• carbon-13

Multiple Choice

If carbon-12 had one less electron, it would become...

• isotope

• cation

• anion

• neutral atom

Multiple Choice

If carbon-12 had one more neutron, it would become...

• boron-11

• nitrogen-13

• carbon-11

• carbon-13

Multiple Choice

What is the name of Al₂O₃

• aluminum oxide

• dialuminum trioxide

• aluminum III oxide

Multiple Choice

What is the name of the compound P₄S₁₀

• phosphorous sulfide

• tetraphosphide decasulfate

• phosphorous decasulfate

• tetraphosphorous decasulfide

Multiple Choice

What is the correct name for CF₄

• Carbon fluoride

• Carbon IV fluoride

• Carbon tetrafluoride

Multiple Choice

What is the correct name for the compound with the formula NH₄NO₃

• ammonium nitrite

• ammonium nitrate

• ammonium nitride

Multiple Choice

These have a positive electric charge and are found in the nucleus of an atom.

• electron
• neutron
• proton

Multiple Choice

What is the percent by mass of sodium in NaCl?

• 39%
• 61%
• 35%
• 65%

Multiple Choice

Which one of these pictures represents a mixture? 

• 1
• 2
• 3
• 1, 2 and 3

Multiple Choice

Which one of these pictures represents a pure substance? 

• 1 and 2
• 1 and 3
• 2 and 3
• 1, 2 and 3

Multiple Choice

What type of mixture is this?

• homogenous mixture
• chemical
• heterogeneous mixture 
• solid mix

Multiple Choice

A combination that can be separated by physical processes is a .....

• Pure Substance

• Glucose

• Element

• Mixture

Multiple Choice

Ag--110 and Ag--112 are two forms of silver with different mass # so they are

• compounds
• isotopes
• orbitals
• neutrons

Multiple Choice

How many protons, electrons and neutrons does an neutral atom of Calcium have?  Its atomic number is 20 and the mass number is 40.

• 20 protons, 18 electrons and 40 neutrons
• 20 protons, 20 electrons and 20 neutrons
• 40 protons, 40 electrons and 20 neutrons
• 20 protons, 18 electrons and 20 neutrons

Multiple Choice

What is the number of protons that the element in this image contain?

• 14

• 7

• 15

• 18

Multiple Choice

An element has three isotopes. Given the abundances and relative masses, calculate the average atomic mass and determine (from the periodic table) which element it is.

Abundances | Relative masses

0.005% | 234.04 amu

0.720% | 235.04 amu

99.275% | 238.05 amu

• Uranium (#92, Atomic Mass: 238.03 amu)

• Fluorine (#9, Atomic Mass: 19.00 amu)

• Mercury (#89, Atomic Mass: 200.59 amu)

• Polonium (#84 209 amu)

Multiple Choice

If X is the symbol for an element, which of the following two symbols represent    isotopes of the same element?     I. ⁷⁷₃₅X  II. ⁷⁷₃₃X  III. ⁸¹₃₇X  IV. ⁸¹₃₅ X

• I and II
• III and IV
• I and IV
• I and III

Multiple Choice

How many neutrons are in an atom of carbon-14?

• 6

• 8

• 10

• 14

Multiple Choice

CaCO₃

• calcium monocarbon trioxide
• calcium carbide
• calcium carbonite
• calcium carbonate

Multiple Choice

Mg(OH)₂

• magnesium dihydroxide
• magnesium hydroxide
• magnesium dioxygen dihydrogen
• magnesium oxyhydride

Multiple Choice

The name of SO₃ compound is

• sulfate
• sulfur oxide
• sulfur trioxide
• monosulfur trioxide

Multiple Choice

Na₂S

• Disodium sulfide

  Disodium sulfide

• Sodium sulfide

• Sodium monosulfide

Multiple Choice

The correct way of showing the isotope of nitrogen with 7 protons and 8 neutrons is:

• ⁸₇N

• ⁷₈N

• ¹⁵₇N

• ⁷₁₅N

Multiple Choice

Atomic Number: 12

Mass Number: 25

Charge: 0

• Most Common Isotope

• Other Isotope

• Cation

• Anion

Multiple Choice

Neutrons: 42

Electrons: 36

Element: Arsenic

• Most common isotope

• Other Isotope

• Anion

• Cation

Multiple Choice

What is the most common isotope of boron?

• boron-5

• boron-10

• boron-11

• boron-13

Multiple Choice

What is the percent by mass of N in (NH₄)₂S?

• 47.1%

• 68.1%

• 44.1%

• 41.1%