Question | Answer |
Basic Information | |
What is an element? | Contains one specific type of atom
All atoms in the element have the same atomic number |
What is the atomic number? | The atomic number is the number of protons an atom has. eg Nitrogen has an atomic number of 4 so all Nitrogen atoms have four protons. |
What is the atomic mass? | The Atomic Mass tells us how heavy an atom is. It is roughly calculated by adding the number of protons and neutrons an atom has. Electrons can be excluded as they are much lighter. |
What is an isotope? | Isotopes are atoms of the same element that have a different mass. They have the same number of protons but a different number of neutrons. |
What is relative atomic mass? | Average mass of the different isotopes of an element. |
What is an ion | Atoms who gain or lose a negative electron become charged as they will have an unbalanced number of electrons and protons. |
What is a cation | If an atom loses an electron it becomes a Positive ion |
What is an anion | If an atom gains an electron it becomes a Negative ion |
What is a molecule | neutral group of two or more atoms held together by chemical bonds |
What are compounds | a group of two or more different types of atoms held together by chemical bonds |
What is a mixture | made from different substances that are not chemically joined |
Chemical Bonding | long lasting attraction between two atoms |
What is chemical bonding | A long-lasting attraction between two atoms that holds them together. |
What is an Ionic Compound | material that is formed of oppositely charged ions in a crystal lattice. |
What are properties of an ionic compound | high melting points, very hard, brittle, conduct electricity when dissolved |
What is an ionic bond | electrostatic force of attraction between two ions.Typically a metal gives an electron, or more than one electron, to a nonmetal. |
What are covalent (molecular) compounds | few atoms held together by bonds |
What is a giant covalent? | |
What is a covalent bond | |
What is a single bond | Single bonds have one pair of electrons. One from each atom.eg a molecule of hydrogen |
What is a double bond | Double bonds have two pairs of electrons. Two from each atom. eg. a molecule of oxygen |
What is a triple bond | Triple bonds have two pairs of electrons. Three from each atom. eg a molecule of Nitrogen |