Edexcel (9-1) Topic 1

How many neutrons does a sodium atom have?

What subatomic particle causes atoms to have different isotopes?

How many electrons can the second shell be filled up to?

This scientist figured out there was a positive nucleus in an atom by firing alpha particles at gold.

Tick all the boxes that contain general properties of metals.

Which part of the periodic table informs you how many electrons are in the outershell of any element?

Ionic bonds are formed of positive and negative ions that are held together by strong electrostatic forces of attraction

Oxidation is [blank_start]loss[blank_end], Reduction is [blank_start]gain[blank_end] Metals always form [blank_start]positive[blank_end] ions ([blank_start]oxidised[blank_end]/lose electrons). A group 2 metal will form a positive [blank_start]ion[blank_end] (loses two [blank_start]electrons[blank_end]). Non-metals form [blank_start]negative[blank_end] ions ([blank_start]reduced[blank_end]/gain electrons)

Which of the following compounds are examples of covalent bonding?

Metallic bonding is made of positive ions that are held together by a “sea of [blank_start]delocalised[blank_end] electrons” from the outer shells of metal atoms. The strong [blank_start]electrostatic[blank_end] forces between the ions and electrons mean metals have very high melting points.

Giant covalent compounds are [blank_start]solid[blank_end] at room temperature. All of the atoms in a giant covalent structure are held together by strong [blank_start]covalent[blank_end] bonds. These bonds have to be broken, by large amounts of energy, to melt or boil these substances. [blank_start]Diamond[blank_end] is made up of each carbon forming [blank_start]four[blank_end] covalent bonds. [blank_start]Graphite[blank_end] is made of hexagonal rings of carbon, each atom forming [blank_start]three[blank_end] bonds. Each atom contributes [blank_start]an electron[blank_end] to the “sea of delocalised electrons”.

Simple covalent compounds can conduct electricity.

Calculate the formula mass of NaNO₃ (RAM Na=23, N=14, O=16)

James burns 0.7 g of magnesium in air. What will be the most likely mass after heating?

HCl is added to Mg in a flask. After 70 seconds all the hydrogen had been released, and there was no more Mg left. Which chemical was the limiting reactant?

Fill the blank space to complete the text. Calculate the relative formula mass of calcium hydroxide (RAM Ca=40, O=16, H=1): [blank_start]74[blank_end]

0.020 moles of calcium nitrate was dissolved in 160 ml of water. Calculate the concentration: [blank_start]0.125[blank_end] mol/dm3

This equation is balanced.

Balance the following equation (use the numbers 1, 2, or 3 to fill the blanks) [blank_start]1[blank_end]N2 + [blank_start]3[blank_end]H2 --> [blank_start]2[blank_end]NH3