Atoms and Elements Quiz

What is an element?

• A substance made up of only neutrons

• A substance made up of only protons

• A substance made up of two or more types of atoms

• A substance made up of only one type of atom

Answer explanation

An element is a substance made up of only one type of atom.

What is the symbol for oxygen?

• N

• O

• K

• C

Answer explanation

The symbol for oxygen is O. It is represented by the letter O in the periodic table.

What is the charge of a proton?

• +1

• +2

• 0

• -1

Answer explanation

The charge of a proton is +1, indicating a positive charge. Therefore, the correct answer is +1.

What is the combining power of hydrogen?

• 1

• 2

• 3

• 4

Answer explanation

Hydrogen has a combining power of 1, meaning it can form one bond with other elements.

Which group in the periodic table includes elements with full outer shells of electrons?

• Group 1 - alkali metals

• Group 2 - alkaline earth metals

• Group 7 - halogens

• Group 8 - noble gases

Answer explanation

The group in the periodic table that includes elements with full outer shells of electrons is Group 8 - noble gases.

What type of bonding involves atoms sharing electrons?

• Covalent bonding

• Metallic bonding

• Alloy bonding

• Ionic bonding

Answer explanation

Covalent bonding involves atoms sharing electrons, making it the correct choice in this context.

What is the melting point of sulfur?

• 113°C

• 445°C

• -183°C

• -218°C

Answer explanation

The correct melting point of sulfur is 113°C, as stated in the answer choice provided.

Which non-metal is a good conductor of electricity in the form of graphite?

• Carbon

• Sulfur

• Helium

• Oxygen

Answer explanation

Graphite is a form of carbon, which is a non-metal and a good conductor of electricity in this form.

What is the melting point of diamond?

• -248°C

• -249°C

• -269°C

• -272°C

Answer explanation

The correct melting point of diamond is -248°C, as it requires a very high temperature to melt due to its strong covalent bonds.

What is the charge of a non-metal in Group 6 of the periodic table?

• -2

• +2

• -1

• +1

Answer explanation

Non-metals in Group 6 of the periodic table typically have a charge of -2, making the correct answer choice -2.