Vocabulary
The smallest building block of chemistry
What is an atom?
Substances can exist in three states
What is solid, liquid, and gas?
Rows are called
What is a Period?
A bond formed by the giving or taking of electrons between atoms.
What is an Ionic Bond?
A reaction that takes in a lot of heat and gives out only a little.
What is Endothermic Reaction?
The number of electrons that can fit in the second shell
What is 8 electrons?
low energy, tightly packed, fixed positions and vibrates slightly.
What is a solid?
Columns are called
What is a Group?
An atom that gains electrons.
What is an Anion?
A reaction that takes in only a little heat and gives out a lot.
What is Exothermic Reaction?
The number of protons in the atom’s nucleus.
What is Atomic Number?
Spread out position, has some movement, takes the shape of the container it is in
What is a liquid?
Rows tell us this about an element
What is how many shells an element has?
An atom that loses electrons.
What is a Cation?
Mass can neither be created or destroyed but is transformed from one form to another
What is Law of Conservation of Mass?
Electrons on the outer shell for pairing
What is a Valence Electron?
High energy, molecules can fly far apart from each other. Will fill the space they’re in.
What is a gas?
This element has 4 shells and 5 valence electrons
What is Arsenic?
Is formed when two pairs of electrons are shared between the two participating atoms.
What is a Double Covalent Bond?
A mixture that has uniform composition. Example: salt water
What is homogeneous mixture?
A bond that involves the sharing of electrons between atoms.
What is a Covalent Bond?
States of matter depends on two things
What is temperature and pressure?
Helium is in Group 8 because
What is it has a one full outer shell so it is non-reactive. You can only have 2 valence electrons on the first shell
Represented by three dashes and are the least stable type of covalent bonds.
What is a Triple Bond?
A reaction is which one element replaces another in a compound.
What is Displacement Reaction?