What is an atom?

• The smallest unit of an element that retains the properties of that element

• A large molecule composed of many elements

• A type of chemical reaction

• A form of energy

What is an element?

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

• A mixture of different compounds

• A type of chemical bond

• A form of energy

What is the periodic table of elements used for?

• Organizing elements based on their atomic number and properties

• Measuring the mass of atoms

• Calculating the speed of chemical reactions

• Determining the temperature of substances

What is an isotope?

• Atoms of the same element with different numbers of neutrons

• A type of chemical bond

• A molecule with a high atomic mass

• A form of energy

What is Brownian motion?

• The random movement of particles suspended in a fluid

• The predictable path of electrons around the nucleus

• The movement of atoms in a solid

• The flow of electricity through a conductor

What are Van Der Waals forces?

• Weak attractions between molecules

• Strong covalent bonds

• Ionic bonds between metals

• Magnetic forces between atoms

What is an electron configuration diagram?

• A chart showing the number of protons in an atom

• A diagram showing the arrangement of electrons in an atom

• A graph of atomic mass versus atomic number

• A table of isotopes and their properties

How many electrons can be held in the first electron shell?

• 2

• 4

• 6

• 8

What is a valence shell? What is a valence electron?

• The innermost shell of an atom; an electron in the innermost shell

• The outermost shell of an atom; an electron in the outermost shell

• A shell with no electrons; an electron in a full shell

• A shell with protons; an electron in the nucleus

What is the octet rule?

• Atoms are stable with 8 protons

• Atoms are stable with 8 neutrons

• Atoms are stable with 8 electrons in their outer shell

• Atoms are stable with 8 isotopes