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Mod Copy of Isotopes, Ionic Compounds, and Average Atomic Mass (11/26/2023)

Last updated 9 months ago

13 questions

Note from the author:

Instructions

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You may use your notebooks and any notes/work papers you want to use.

You may use your notebooks and any notes/work papers you want to use.

Question 1

1.

Different isotopes of the same element have different–

numbers of protons in the nucleus.

quantities of neutrons.

locations on the periodic table.

kinds of electrons in their orbitals.

Question 2

2.

An isotope of mercury has 80 protons and 120 neutrons. What is the mass number of this isotope?

120

40

80

200

Question 3

3.

What property is different in different isotopes of the same element?

The number of protons

Their locations on the periodic table

The charge of an electron

Their mass numbers

Question 4

4.

Element X has 2 naturally occurring isotopes. Its first isotope has an atomic mass of 40.00 amu and a natural abundance of 97.41%. Its second isotope has an atomic mass of 41.10 amu. What is the atomic mass of element X?

40.03 amu

40.11 amu

40.77 amu

40.28 amu

Question 5

5.

Which of the following is true about a calcium atom (Ca) and a calcium ion (Ca2+)?

A calcium atom is larger and has more electrons.

A calcium ion is smaller and has more electrons.

A calcium ion is larger and has less electrons.

A calcium atom is smaller and has less electrons.

Question 6

6.

Which of the following ions has the largest radius?

F-

Cl-

Br-

I-

Question 7

7.

Atoms are __________because they have the same number of protons and electrons. However, based on valence electrons, some atoms will easily gain or lose electrons to other atoms in order to achieve noble gas electronic structure. __________ are atoms that have gained or lost electrons.  Atoms that have __________electrons have a positive charge and are called __________.  Atoms that have __________electrons have a negative charge and are called __________.

Question 8

8.

Which of the following shows the correct Lewis Dot structure for fluorine?

Question 9

9.

Which of the following is the correct Lewis Dot structure for oxygen?

Question 10

10.

What is the formula for the ionic compound formed between Ba2+ and O2-?

Ba2O

BaO

BaO2

Question 11

11.

What is the formula for the ionic compound formed between Ca2+ and Br1-?

Ca2Br2

CaBr

CaBr2

Question 12

12.

What is the formula for sodium oxide?

NaO

NaO2

Na2O2

Na2O

Question 13

13.

Name this compound: BaCl2

barium dichlorine

barium dichloride

barium chlorine

barium chloride

Ba2O2

Ca2Br