10y4: Foundation Resit

What hazard is this sign warning you of?

• Flammable

• Corrosive

• Explosive

• Irritant

Imagine you are at room temperature in the classroom. Match the following

• (aq)- Aqueous

• 
• (l)- Liquid

• 
• (S)- Solid

• 

Put the following in order of size from smallest to largest

• Electron

• Proton

• Atom

• Molecule

• Lattice

Atomic​ (a)   is the number of protons in an atom.

Atomic​ (b)   is the total number of protons and neutrons

• Number
• Mass

Beryllium is on the left hand side of the periodic table. This means that Beryllium is a

• Metal

• Halogen in group 7

• Compound

• Gas at room temperature because its a non-metal

Give the symbol of the element in period 2 (don't forget to count period 1) and group 3.

• B

• Ca

• Al

Potassium has 19 electrons, how many shells does it have in its atom?

Sort the differences between Mendeleev's periodic table and the modern periodic table

Groups:

(a) Mendeleev's PT

,

(b) Modern Periodic table

• Ordered by atomic number and how many protons

• Ordered by atomic mass and how heavy atoms are

• Missing Elements

• No gaps

Atoms have no overall charge because​ (a)   ​ (b)   cancel out the charge of the​ (c)   ​ electrons.

• positive
• protons
• negative

Atomic Mass shows the number of every particle in the nucleus.

Atomic number shows only the protons (and electrons)

How many Neutrons does Cl-37 have?

• 20

• 19

• 18

• 17