Chapter 8: Atoms and Molecules (Part 1)

An atom is made up of a nucleus containing _____ and _____with _____ moving around the nucleus.

• electrons, protons, neutrons

• neutrons, electrons, protons

• protons, neutrons, electrons

• protons, electrons, neutrons

Which of the following is found in the nucleus of an atom?

• protons only

• protons and electrons

• protons and neutrons

• electrons only

Which of the following is an electron?

• A

• B

• C

• D

Which one of the following is correct?

• A

• B

• C

• D

Which of the following statement(s) about an atom is/are true?

You may choose more than one answer.

• An electron is located inside the nucleus of an atom.

• A proton is located inside the nucleus of an atom.

• A neutron is located inside the nucleus of an atom.

Which one of the following is not a symbol for an atom?

• Br

• Cl

• Fl

• Co

Which atom is electrically neutral?

• A

• B

• C

• D

A fluorine atom has 9 protons.

How many electrons does the fluorine atom have?

• 7

• 8

• 9

• 10

You are given two atoms, Atom A and Atom J. Atom A has 5 protons and Atom J has 7 protons.

Which of the following statements is true?

You may choose MORE THAN ONE answer.

• Atom A has 5 electrons.

• Atom J has 5 electrons.

• Atom A and Atom J are from the same element.

• Atom A and Atom J both have a net positive change.

• Atom A and Atom J are electrically neutral.

The diagram represents a substance.

If the substance is has a positive electrical charge, what inference can be made?

• The number of electrons can be found from the difference between P and Q.

• The number of electrons is equal to Q.

• The number of electrons is greater than Q.

• The number of electrons is smaller than Q.