periodic table
chemical reactions
chemical equations
chemical reactions 2
atoms, compounds and molecules
100

Identify the number of elements on the periodic table.

118

100

AB -> A + B is what type of reaction 

Decomposition 

100

HCL is a chemical formula for?

hydrochloric acid 

100

Classify this type of reaction:

N2 (g) + H2O (g) + O2 (g) → NH4NO3 (s)

Synthesis or combination 

100

A positively charges particle in the atomic nucleus. its mass is approximately 1 atomic unit.

proton

200

Identify the family name given to the elements of group 8.

nobel gases 

200

When burning magnesium, it combines with oxygen to form what compound?

2 Mg(s)   +    O2(g)      →     2 MgO(s)

magnesium oxide 

200

Zn+S→ZnS
convert this to a worded equation.

zinc+sulfur→zinc sulfide

200

products of Acid-Base Reactions

salt and water 

200

true or false protons have a similar mass to neutrons and hold a positive charge.

true

300

what position on the periodic table is phosphorous 

period 3 group 5

300

rust is the product of what reaction? 

corrosion or oxidation

300

Fe2O3 what is this a chemical formula for?

iron oxide 

300

The process of transforming a dissolved substance into an insoluble solid. 

Formation of a separable solid substance from a solution

precipitation reaction

300

what is the difference between a molecule and compound?

  • A molecule is formed when two or more atoms of an element chemically join together.
  • A compound is a type of molecule, in which the types of atoms forming the molecule are different from each other.
400

what is the chemical element for lead?

pb

400

Neutralisation is the reaction between a _____ and a _____

acid, base 

400

Balance this equation 

 ___ SnO₂ + ___ H₂ → ___ Sn + ___ H₂O

SnO₂ + 2 H₂ → Sn + 2 H₂O

400

What is the type of reaction for this chemical reaction: 

AgNO₃ (aq) + NaCl (aq) → AgCl (s) + NaNO₃ (aq)

Double displacement & precipitation  

double points for both 

400

what are covalent bonds.

Covalent bonding is the sharing of electrons between atoms.

500

element with atomic number 40 

zirconium 

500

Zinc(s) + oxygen(g) -> zinc oxide(s)

Do the mass of the reactants on a crucible = products 

No, heavier after 

500

balance this equation ___ P4 + ___H2 ---> ___PH3

1P4+6H2---->4PH3

500

What do the products of a combustion reaction always include?

CO2 and H2O

500

how many electrons does magnesium have in its outer shell?

3 (altogether it has 12 electrons -> 2 in the first, 8 in the 2nd and 3 in the 3rd)true