Untitled Deck Flashcards
What is fractional distiliation?
A method of separating a mixture of substances according to their different boiling points.
What is a group in a periodic table?
The columns of the periodic table represent different groups of elements. Elements with similar properties are in the same group.
What are halogens?
The elements in Group 7 of the periodic table.
What are ions?
An atom or molecule with an electric charge due to the loss or gain of electrons.
What is an isotype?
Atoms of the same element with the same number of protons but a different number of neutrons.
What is a mass number?
The total number of protons and neutrons in the nucleus.
What are metals in terms of elements?
Elements that react to form positive ions.
Where are metals found?
Found to the left and towards the bottom of the periodic table.
What is a mixture?
A mixture consists of two or more elements or compounds not chemically combined together.
What is a neutron?
Neutral subatomic particle present in the nucleus of the atom. Relative mass of 1.
What are the nobel gasses?
The elements in Group 0 of the periodic table.
What are the non-metals?
Elements that react to form negative ions. Found towards the right and top of the periodic table.
What was the Nuclear model?
The nuclear atomic model stated that the mass was concentrated at the centre of the atom and that the nucleus was charged.
What is the periodic table?
Table of elements arranged in order of atomic number and such that elements with similar properties are in the same column (group).
What was the plum pudding model?
Atomic model devised after the discovery of the electron. The model suggests the atom is a ball of positive charge with negative electrons scattered through it.
What is a proton?
Positively charged subatomic particle present in the nucleus of the atom. Relative mass of 1.
What is the relative atomic mass (RAM)?
An average value that takes account of the abundance of the isotopes of the element.
What is simple distilliation?
A procedure by which two liquids with different boiling points can be separated.
What are the transition metals?
The collection of metallic elements in the middle of the periodic table.
What is fractional distiliation?
A method of separating a mixture of substances according to their different boiling points.
