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Free Practice Quiz Question List

2 Atoms, Elements, and the Periodic Table Online Quiz Questions

Use this free practice quiz with 20 questions to review 2 Atoms, Elements, and the Periodic Table, test your knowledge, and prepare for your next test or exam.

20 questions
01
True or false
1 point

True or false: Elements in the same group of the periodic table often have similar chemical behavior.

  1. A

    True

  2. B

    False

02
Written response
1 point

What term describes an atom or group of atoms that has an electrical charge because it has gained or lost electrons?

03
Fill in the blank
1 point

The horizontal rows of the periodic table are called .

04
Choose one
1 point

Where are metalloids generally located on the periodic table?

  1. A

    In the far-left column of the table

  2. B

    In the two rows below the main table

  3. C

    Along the zigzag boundary between metals and nonmetals

  4. D

    In the far-right column of the table

05
Choose one
1 point

As you move from left to right across a period, which statement describes the change in atomic number?

  1. A

    Atomic number decreases from left to right across a period.

  2. B

    Atomic number increases from left to right across a period.

  3. C

    Average atomic mass must increase by exactly one unit at each step.

  4. D

    The number of neutrons is the same for every element in a period.

06
Choose all
1 point

Select all statements that correctly compare carbon-12 and carbon-14.

  1. A

    Both isotopes have 6 protons.

  2. B

    Carbon-12 has 6 neutrons, while carbon-14 has 8.

  3. C

    Their mass numbers are 12 and 14, respectively.

  4. D

    Carbon-14 has 14 protons.

  5. E

    They are different elements because their neutron counts differ.

07
Choose one
1 point

An atom has atomic number 15 and mass number 31. How many neutrons does it have?

  1. A

    16

  2. B

    15

  3. C

    31

  4. D

    46

08
Fill in the blank
1 point

A neutral atom has atomic number 13. It has electrons.

09
Written response
1 point

What element is an atom with 8 protons?

10
Choose all
1 point

Select all statements that correctly describe how ions form.

  1. A

    The number of protons does not change when an atom becomes an ion.

  2. B

    Losing electrons produces a positively charged cation.

  3. C

    Gaining electrons produces a negatively charged anion.

  4. D

    Gaining protons is what makes an atom a negatively charged ion.

  5. E

    An ion's charge is determined by its number of neutrons.

11
Choose one
1 point

An ion has 12 protons and 10 electrons. What is its charge, expressed in units of the elementary charge?

  1. A

    +2+2

  2. B

    −2-2

  3. C

    +1+1

  4. D

    00

12
True or false
1 point

True or false: A periodic-table atomic mass of about 35.45 means that each chlorine atom has a mass number of 35.45.

  1. A

    True

  2. B

    False

13
Open ended
1 point

Chlorine's periodic-table atomic mass is about 35.45. Explain why this does not mean that each chlorine atom has a mass number of 35.45.

14
True or false
1 point

True or false: Hydrogen is a nonmetal, even though it appears at the top of Group 1.

  1. A

    True

  2. B

    False

15
Choose one
1 point

A neutral oxygen atom has atomic number 8. How many electrons does it have?

  1. A

    6

  2. B

    8

  3. C

    10

  4. D

    16

16
Choose one
1 point

What happens when an atom loses one or more electrons?

  1. A

    It becomes an anion

  2. B

    It becomes a different element

  3. C

    It becomes a cation

  4. D

    Its number of protons decreases

17
Written response
1 point

What is the name for a row of the periodic table?

18
Choose one
1 point

As you move from left to right across a periodic-table row, which quantity increases in the table's ordering?

  1. A

    Atomic number increases from left to right

  2. B

    Atomic mass is always a whole number from left to right

  3. C

    The number of neutrons decreases by one for every step to the right

  4. D

    Elements are arranged alphabetically by name

19
Choose one
1 point

Two atoms are isotopes of the same element. Which statement must be true about them?

  1. A

    They have different numbers of protons but the same number of neutrons

  2. B

    They have the same number of protons but different numbers of neutrons

  3. C

    They have the same number of electrons but different numbers of protons

  4. D

    They have different numbers of protons and different numbers of electrons

20
Written response
1 point

An ion has 15 protons and 18 electrons. What is its charge? Enter the signed charge as an integer.