What are Protons- positive
Electrons- negative
Neutrons- 0/neutral
100
The two types of chemical bonds
What is ionic and covalent
200
The least amount of electrons in any given atom.
What is 2?
200
Matter/mass doesn't change in a chemical
Reaction. The number of atoms in reactants
Equals the number number of atoms in products. The mas before= mass after
What is the law of conservation of matter/mass?
200
The state of matter in which atoms are tightly packed and vibrate slowly
What is a solid
200
The subatomic particles found in the nucleus and the subatomic particles found in shells.
What are protons and neutrons (in the nucleus) and electrons (in the shells)
200
The range of the pH scale and where acids, bases, and neutral substances fall in the pH scale.
What is 0-14? Acids have a pH between 0-6, bases have a pH between 8-14. 7 is neutral
300
The amount of different types of atoms that exist.
What is 100? (the same number as the amount of elements. Number of known elements=number of atoms)
300
The starting and ending substances in a chemical reaction.
What are reactants and products?
300
The state(s) of matter in which particles take the shape of their container
What are liquids and gases
300
Electrons in the outer shell and how they are determined from the periodic table.
What are valence electrons; determined by the group number
300
This happens when an acid and base are combined
What is neutralization
400
Elements in the same group share these in common.
What are physical and chemical properties?
400
Change of state, change in size are examples of
What is a physical change?
400
The effect of removing energy from a substance
What is a decrease in the speed of the substances' speed