Atomic Structure
Name the three subatomic particles in an atom.
Proton, neutron and electron
What does the periodic table show?
All of the known elements
What is the pH of a neutral substance?
7
What happens to the temperature during an exothermic reaction?
Temperature increases
Name the bonding between non-metals only
Covalent
What is the charge of a proton?
Positive (+1)
How are the elements arranged on the periodic table?
Increasing atomic number
Is toothpaste an acid or alkali?
Alkali
What type of reaction releases heat to the surroundings?
Endothermic Reaction
Sodium Chloride is an example of which type of bonding
ionic
Which two subatomic particles are found in the nucleus of an atom?
protons and neutrons
What is the atomic number of Oxygen?
8
What is the test for hydrogen gas?
Squeaky pop
In an endothermic reaction’s energy profile, which is higher: reactants or products?
Products
What type of bond is formed when two atoms share electrons?
Covalent bonding
Give the PEN Numbers for Carbon (Mass number 12, Atomic number 6)
P - 6
E - 6
N - 6
Why are metals good conductors of electricity?
They have delocalised electrons to carry charge through the entire structure
What colour does universal indicator turn in a strong alkali, and what is its pH value?
Purple - pH 13/14
Define activation energy
The minimum energy needed for a reaction to start
Name the strong forces between elements in ionic bonding
Strong electrostatic forces
Why is an atom neutral even though it contains charged particles?
Because it has the same number of positive protons and negative electrons, so the charges cancel out.
What happens to the reactivity of Group 1 metals as you go down the group?
It increases
What two products are made when a metal reacts with an acid?
Salt and hydrogen
How can a catalyst affect the activation energy shown in an energy profile?
Causes the activation energy to decrease
Explain why Alloy metals are harder than pure metals
Alloy metals have different sized metals - distorts the layers so they can no longer slide