Topic 1
This item is used to separate solids from liquids.
What is filter paper
bonding between metallic elements and alloys
What is Metallic Bonding
no atoms are lost or made during a chemical reaction so the mass of the reactants and products is equal.
What is the law of conservation of mass
produced when a metal reacts with oxygen
What is a metal oxide
A piece of apparatus used to measure a change in temperature.
What is a thermometer?
Where protons and neutrons are found
The nucleus of the atom
A bond between a metal and non-metal
What is an ionic bond
a compound is the sum of the relative atomic masses of atoms in the numbers shown in the formula.
What is Mr (relative formula mass)
the charge a metal ion has
What is positive.
the term given to a reaction which transfers heat energy to the surroundings?
What is exothermic?
Who devised the plum pudding model?
JJ Thompson
What is covalent bonding
the mass of a solute in a given volume of solvent
What is concentration (g/dm3)
The elements that react vigorously with water.
What is group 1 alkali metals
Barium hydroxide and ammonium chloride react and the temperature of the mixture decreases.
What is an example of an endothermic reaction?
A type of atom with the same number of protons but a different number of neutrons
What is an isotope
each carbon atom forms four covalent bonds with other carbon atoms in a giant covalent structure
What is bonding in diamond
the type of bonding found in water?
Covalent
Reduction in terms of electrons
Gain of electrons
A polystyrene cup.
What should be used to contain the solution when investigating an energy change?
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.
What is the reason group 7 reactivity decreases down the group?
Each carbon atom forms three covalent bonds with three other carbon atoms, forming layers that have no covalent bonds between them.
What is bonding in graphite
the name of the salt when copper oxide reacts with sulfuric acid?
copper sulfate
Is the loss of electrons
What is oxidation?
More energy is absorbed when breaking reactant bonds than is released when making product bonds
What explains why a reaction is endothermic?