Vocab Flashcards
Atom
the basic building blocks of matter & the smallest particle to take place in a chemical reaction
Element
a substance made up of only one type of atom
Compound
a substance made up of more than one type of atom, chemically combined in a fixed ratio
Atomic Number
The number of protons in the nucleus of an atom: this determines the placement of the element on the Periodic Table
Mass Number
The total number of protons and neutrons in the nucleus of an atom
Electron Configuration
The arrangement of electrons around the nucleus of an atom or ion. Electrons occupy shells which can hold a maximum of 2, 8, 8, 2 electrons
Ion
An atom that has gained or lost electrons and has a charge
Valency
An atom that has gained or lost electrons and has a charge
Nucleus
The nucleus is the information centre of the cell
Electron
the negatively charged particles of atom (-)
Proton
positively charged particles found within atom (+)
Neutron
neutral particle that is found in an atom (0)
Period
A period in the periodic table is a row of chemical elements. All elements in a row have the same number of electron shells
Group
a group is a column of elements in the periodic table of the chemical elements. There are 18 numbered groups in the periodic table
Indicator
an indicator is a substance that changes colour in acidic and base solutions E.G.
LITMUS - 2 colours, it can either be blue or red, red in acid, blue in base
UNIVERSAL - roy g biv
