Introductory Atoms And Molecules Quiz

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The smallest particle of an element that retains the chemical properties of that element is called a/an

Molecule

Compound

Atom

Ion

Which of the following is the correct order of subatomic particles in terms of increasing mass?

Proton, electron, neutron

Electron, proton, neutron

Electron, neutron, proton

Neutron, electron, proton

Which of the following subatomic particles has a negative charge?

Proton

Electron

Neutron

None of the answers

Which of the following subatomic particles has a positive charge?

Proton

Electron

Neutron

None of the answers

Which of the following subatomic particles has no charge?

Proton

Electron

Neutron

None of the Answers

An atom is neutral when the number of protons is equal to the number of

Electrons

Neutrons

Ions

Nucleons

The atomic number of an element is determined by the number of

Protons in the nucleus

Electrons in the nucleus

Neutrons in the nucleus

Ions in the nucleus

The mass number of an atom is determined by the number of:

Protons in the nucleus

Electrons in the nucleus

Neutrons in the nucleus

Ions in the nucleus

Isotopes of an element have the same number of:

Protons in the nucleus

Electrons in the nucleus

Neutrons in the nucleus

Ions in the nucleus

10.

Which of the following is the correct symbol for a proton?

None of the answers

11.

Which of the following is the correct symbol for an electron?

None of the Answer

12.

Which of the following is the correct symbol for a neutron?

None of the above

13.

The valency of an element is determined by the number of:

Protons in the nucleus

Electrons in the nucleus

Neutrons in the nucleus

Ions in the nucleus

14.

The combining capacity of an element is determined by its:

Atomic number

Mass number

Electronegativity

d) Valency

15.

Which of the following is a compound?

Hydrogen

Oxygen

Water

Helium

16.

Which of the following is not a molecule?

H2O

NaCl

17.

The chemical formula of water is

H2O

HO2

H2O2

(H2O)2

18.

The chemical formula of carbon dioxide is

CO2

C2O

C2O2

19.

Which of the following is not a characteristic of a compound?

It can be separated into its constituent elements by physical means.

It has a fixed composition.

It has a unique set of physical and chemical properties.

It can be formed by a chemical reaction between elements.

20.

Avogadro's number is equal to:

6.02 x 10^23

6.02 x 10^-23

6.23 x 10^23

6.23 x 10^-23

21.

The molar mass of a substance is equal to:

The mass of one mole of the substance.

The atomic mass of the substance.

The molecular mass of the substance.

The number of atoms in one mole of the substance.

Introductory Atoms and Molecules Quiz

Atoms and Molecules

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Atoms and Molecules

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