Periodic table
These elements are ductile, lustrous, and have high melting points.
Metals
These two particle types are found in the nucleus.
Protons and neutrons
This is the total number of atoms in a molecule of calcium carbonate CaCO3
Five
According to the Law of Conservation of Mass, this quantity remains unchanged during a chemical reaction.
Total mass or number of atoms
Australia has this many states.
Six
This element is found in Group 2 Period 3.
Magnesium
An atom becomes this when it gains or loses electrons.
Ion
Write the formula for calcium chloride.
CaCl₂
The reaction CaCO₃ → CaO + CO₂ is this type of reaction.
Decomposition reaction
This sport uses a shuttlecock.
Badminton
The horizontal rows of the periodic table are called these.
Periods
A sodium atom loses one electron to form this ion.
Na+
Balance this equation:
___ H₂ + O₂ → 2H₂O
2H₂ + O₂ → 2H₂O
Crushing a tablet increases this and speeds up the reaction.
Surface area
This sport is played at Wimbledon.
Tennis
This element has the atomic number 17.
Chlorine
This element has the electron configuration of 2, 8, 6.
Sulfur
Write the formula for aluminium oxide.
Al₂O₃
The products of a chemical reaction between metal and acid.
Salt and hydrogen gas
The first letter of the Greek alphabet.
Alpha
Elements in this column of the periodic table are known for being very unreactive due their stable electron configuration.
Noble gases
The number of valence electrons in Na.
One
Balance this equation:
___ Al + ___ O₂ → ___ Al₂O₃
4Al + 3O₂ → 2Al₂O₃?
Collision theory states that reactions occur when particles collide with ________.
Enough energy and right orientation
The maximum number of players a team can have on the field at one time in a standard soccer match.
11