Ch 14 Review PS

Which of the following best describes an element?

• A substance made up of two or more different atoms chemically combined.

• A substance that cannot be broken down into simpler substances by chemical means.

• A group of atoms that are held together by chemical bonds.

• A substance formed when two or more atoms are combined.

What is the atomic number of an element?

• The number of protons in the nucleus of an atom.

• The number of neutrons in the nucleus of an atom.

• The total number of protons and neutrons in an atom.

• The number of electrons in the outer shell of an atom.

Which of the following is NOT a characteristic of metals?

• Good conductors of electricity and heat.

• Dull appearance.

• Malleable and ductile.

• High melting and boiling points.

The elements in Group 1 of the periodic table are known as:

• Halogens.

• Alkali metals.

• Noble gases.

• Transition metals.

What is the symbol for the element Iron?

• Fe

• I

• Ir

• F

Which of the following elements is a non-metal?

• Calcium

• Sodium

• Oxygen

• Iron

Which of the following elements is a halogen?

• Helium

• Chlorine

• Potassium

• Magnesium

Which element has the atomic number 8?

• Oxygen

• Nitrogen

• Carbon

• Hydrogen

What does the atomic mass of an element represent?

• The number of protons in the nucleus of an atom.

• The total number of protons and neutrons in an atom.

• The number of electrons in the outer shell of an atom.

• The number of neutrons in the nucleus of an atom.

Which of the following elements is a noble gas?

• Oxygen

• Argon

• Phosphorus

• Sodium