Chemical Changes And Structure Flashcards
What is a Nuetrons charge and relative mass?
Where are they found?
Neutrons are neutral so they have no charge , they have a relative mass of 1
They are found in the nucleus of an atom
Can covalent molecules conduct electricity?
No because there aren’t any charged particles that are free to move
What are the 4 types (shape) of covalent bonding ?
Linear, angular, trigonal pyramidal, tetrahedral
How can mass number be calculated?
By adding together the number of protons and neutrons in an atom
How do you calculate number of neutrons ?
Number of neutrons
=
Mass number - atomic number
What is nuclide notation?
Mass number SYMBOL
Atomic number SYMBOL
Eg
35 CL
17
Are protons positively or negatively charged?
Where are they found?
Protons are positively charged with a charge of 1+ and a relative mass of 1
They are found in the nucleus of an atom
When the temperature of a reaction is increased, what happens to rate of reaction?
Rate of reaction increases
What is a negative ion?
A particle that has more electrons than protons
What is an atomic number?
The number of protons in an atom
Atomic number is usually given next to the atomic symbol
Diatomic definition?
Molecules made up of 2 atoms
When the particle size of a solid reactant is increased what happens to rate of reaction?
The rate of reaction decreases
What is the electron arrangement of oxygen ?
2,6
What is electrons charge and relative mass?
Where are they found ?
Electrons are negatively charged with a charge of -1 and have virtually no mass
They are found orbiting the nucleus of an atom
What affects the rate of a chemical reaction?
Concentration, particle size, temperature and use of a catalyst