Year 11 Chemistry Key Terms

What is an atom?

• An atom is a type of fruit
• An atom is the smallest unit of matter that retains the properties of an element.
• An atom is a unit of time measurement
• An atom is a mythical creature

What is the atomic number equal to?

• Number of protons
• Number of electrons
• Number of isotopes
• Number of neutrons

What is the atomic mass of an element?

• The atomic mass is the average mass of an atom of an element, the number of protons plus the number of neutrons.

• The atomic mass of an element is the same as its atomic number.
• The atomic mass of an element is always a whole number.
• The atomic mass of an element is the number of protons it has.

What is the atomic symbol of Sodium?

• Su
• Na
• Sn
• So

what is an ion?

• An ion is an atom or molecule that has a net electrical charge.
• An ion is a type of animal
• An ion is a unit of measurement
• An ion is a type of plant

What is an isotope

• Atoms with the same number of protons and electrons
• Atoms of the same element with different numbers of neutrons.
• Molecules with different chemical compositions
• Elements with identical atomic numbers

What is an element?

• A substance that cannot be broken down into simpler substances by chemical means.
• A substance that is only found in living organisms.
• A substance that is a combination of two or more elements.
• A substance that can be broken down into simpler substances by chemical means.

What is a compound?

• A compound is a substance formed by a single chemical element
• A compound is a substance formed by physical mixing of elements
• A compound is a mixture of two or more chemical elements
• A compound is a substance formed when two or more chemical elements are chemically bonded together.

Which of the following is a noble gas?

• Oxygen

• Hydrogen

• Argon

• Nitrogen

What type of bond is formed when two atoms share electrons?

• Ionic bond

• Covalent bond

• Metallic bond

• Hydrogen bond