These pure substances are organized on the periodic table according to their number of protons.
What are elements?
100
This is the charge on an electron.
What is negative?
100
Electrons are arranged in shells around the nucleus of an atom, the first shell has the lowest energy level and can only hold this number of electrons.
What is 2?
100
This type of atom has a charge.
What is an ion?
100
This type of bond forms when non-metals bond together and share electrons.
What is a covalent bond?
200
Each element is made up of only one type of these.
What is an atom?
200
These sub-atomic particles orbit the nucleus of an atom in shells.
What are electrons?
200
This element has an electron arrangement of 2, 8, 2.
What is magnesium?
200
Ions will have this type of charge if it loses electrons from it's outer shells.
What is a positive charge?
200
Draw a "stick and ball" diagram for a water molecule.
Check diagrams.
300
The elements in the periodic table are arranged in columns, also known as these.
What are groups?
300
The atomic number of an element is determined by the number of this sub-atomic particle, because all elements have a different number of these.
What are protons?
300
Draw the electron structure of Aluminium.
Check diagrams.
300
Ionic molecules are formed by these two categories of elements bonding together.
What are metals and non-metals?
300
When chemical reactions occur, these starting chemicals react and produce products?
What are reactants?
400
Atoms are made of sub-atomic particles, these two are found in the nucleus.
What are protons and neutrons.
400
The atomic mass of an element can be calculated by adding the total number of these two sub-atomic particles.
What are protons and neutrons?
400
This group of elements have an ionic charge of 1- because they gain an electron to complete thier outer shells.
What are halogens?
400
In a molecule of Sodium Chloride, there will be this number of sodium atoms.
What is 1?
400
Balanced chemical equations show that the same amount of atoms which started the reaction will be changed and produce new chemicals with the same amount of atoms. Balance this equation:
2Na + 2O2 -> __Na02
What is 2?
500
Atoms can bond together to form molecules. This type of molecule is made by 2 or more different types of atom bonding together.
What is a compound molecule?
500
This noble gas has 18 protons.
What is Argon?
500
An aluminum ion has this charge because it gains electrons to complete it's outer shell
What is 3-?
500
This is the symbol for the magnesium chloride molecule.
What is MgCl2? ("2" should be subscript)
500
Balanced chemical equations show that the same amount of atoms which started the reaction will be changed and produce new chemicals with the same amount of atoms. Balance this equation:
__H2 + O2 -> __H20