Unit 1 Chemical Changes And Structure Flashcards
What are electrons
A negatively charged particle and have a mass of almost zero
How do you calculate the average rate of a reaction
Average rate = change in quantity over
Change in time
What are protons
They are positively charged particles and are said to have a relative mass of 1
What is a Neutron
Neutral particles and have a relative mass of 1
Where is an electron position in the atom
In different energy levels
What number is the mass number and what one is the atomic number
23 11 Na
23 is the mass number and 11 is the atomic number
How do you calculate the number of neutrons
Mass number - protons = neutrons
What is an isotope
A atom with the same atomic number different mass number
What is an ion
Ions are charged particles and are formed when atoms lose or gain electrons
What is ionic bonding
Ionic bonds are the electrostatic forces
Of attraction between positive ions and negative ions
What is a covalent bond
A covalent bond is a shared pair of electrons between two non metal atoms
What is a diatomic element
A diatomic is a molecule that contains only two atoms
How do you write chemical formula for a compound
Yous the SVSDF system
What is a mole
It’s a unit of measurement
What is dilution
Diluting an acid makes its pH go up towards 7 and diluting a alkali makes its pH go down towards 7
