Chemistry Revision Unit 1 Flashcards
Name 3 gases in the atmosphere.
The best 3 to put would be nitrogen, oxygen and argon
Are Group 7 (halogens) more reactive at the top and less reactive at the bottom YES or NO
YES, The atomic mass of the halogens increases. They increase in electron shells; so the atoms are larger as you go down the group. Therefore, the attraction of the outer electron to the nucleus decreases as you go down group 7.
What colour is chlorine as a gas?
It’s a green gas.
What colour is bromine as a liquid?
brown/red as a liquid.
What colour is Iodine as a solid?
Black as a solid.
Are the Halogens Metals?
No they are all non-metals but astatine shows certain properties resembling those of the metals.
What colour and state of matter is fluorine at room temperature.
It’s a yellow gas.
Name 3 elements in Group 1.
Possible answers are: lithium, sodium, potassium, rubidium, caesium and francium.
Name 3 elements in Group 7.
Possible answers are: fluorine, chlorine, bromine, iodine and astatine.
What is the atomic number in elements?
The number of protons in the nucleus of each atom of that element.
What is the mass number in elements?
The total number of protons and neutrons in an atom.
True or False group 1 metals form an acidic solution when reacting with water.
FALSE. They form an alkaline solution and the group is also known as the alkali metals.
How many electrons is on an outer shell of a group 1 element ?
1.
What are some common properties group 1 metals share with each other?
They are all soft metals which can easily be cut with a knife
They have relatively low densities and low melting points
They are very reactive (they only need to lose one electron to become highly stable).
What is the word equation for group 1 metals reaction with water?
Group 1 metal + water ⟶ metal hydroxide + hydrogen.
