Topic 1
This item is used to separate solids from liquids.
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bonding between metallic elements and alloys
Metallic Bonding
no atoms are lost or made during a chemical reaction so the mass of the reactants and products is equal.
law of conservation of mass
produced when a metal reacts with oxygen
metal oxide
A piece of apparatus used to measure a change in temperature.
thermometer?
Where protons and neutrons are found
The nucleus of the atom
A bond between a metal and non-metal
ionic bond
a compound is the sum of the relative atomic masses of atoms in the numbers shown in the formula.
Mr (relative formula mass)
the charge a metal ion has
positive.
the term given to a reaction which transfers heat energy to the surroundings?
exothermic?
In their periodic tables, Medeleev and Newland arranged elements in order of . . .
Atomic weights
electrons are shared between two non-metals to make strong bonds
covalent bonding
the mass of a solute in a given volume of solvent
concentration (g/dm3)
The elements that react vigorously with water.
group 1 alkali metals
Barium hydroxide and ammonium chloride react and the temperature of the mixture decreases.
endothermic reaction
A type of atom with the same number of protons but a different number of neutrons
isotope
each carbon atom forms four covalent bonds with other carbon atoms in a giant covalent structure
bonding in diamond
6.02x1023 particles
Avagadro's number
Reduction
What is the term used when a substance loses oxygen/ gains electrons
What should be used to contain the solution when investigating an energy change?
A polystyrene cup.
What is the reason group 7 reactivity decreases down the group?
As you go down group 7 the atoms get bigger because they have more electron shells, this mean the attractive force of the nucleus is weak and so it is harder to gain an extra electron.
Each carbon atom forms three covalent bonds with three other carbon atoms, forming layers that have no covalent bonds between them.
bonding in graphite
the mass of one of these in grams is equal to the relative formula mass
mole of a substance
Is the loss of electrons
oxidation
More energy is absorbed when breaking reactant bonds than is released when making product bonds
endothermic