Fichas
GCSE 1
Fichas del conjunto (16)
- 1What does the nucleus contain?Protons and Electrons
- 2What are the differences between the three particles (weight and charge)Protons - Heavy and have a positive charge
Neutrons - Heavy and neutral (no charge)
Electrons are tiny and have a negative charge. - 3What is the name of the top and bottom number of each element and what does it tell you?Top - MASS NUMBER - Total number of protons and neutrons.
Bottom - ATOMIC NUMBER - Number of protons in the atom. - 4What are Isotopes?They are different atomic forms of the same element, which have the same number of protons but a different number of neutrons.
- 5What is an Ion?A charged particle that is formed when an atom gains of loses and electron.
- 6How did Mendeleev arrange his table of elements?He arranged it in order of increasing atomic mass.
- 7Name the 3 Transition MetalsCopper
Iron
Lead - 8Name the 3 Alkali Metals.Lithium
Sodium
Potassium - 9Name the 4 Halogens.Fluorine
Chlorine
Bromine
Iodine - 10Name the 6 noble gases.Helium
Neon
Argon
Krypton
Xenon
Radon - 11What do all noble gases have in common?They all have a full outer shell of electrons this means they are un reactive.
- 12What is relative atomic mass?Its the weighted average of all the isotopes in a sample.
- 13Give properties of a giant covalent compoundSolid at room temperature
High Melting/Boiling Points
Strong covalent bonds between atoms.
Do not conduct electricity (except graphite)
Insoluble in water - 14Give properties of a simple covalent compoundGases and liquids at room temp
Low Melting/Boiling Points
Weak intermolecular forces between molecules
Do not conduct electricity
Soluble in water. - 15Why can graphite conduct electricity?They have weak intermolecular forces between layers allows layers to slide over eachother. It conducts electricity due to spare electrons which are free to move between the layers.
- 16—