C1 Chemistry - Atoms, elements, the periodic table, and limestone Flashcards
what is the definition of a solid?
particles that are lined up and there is no movement
what is the definition of a liquid?
particles are close but there is little movement
what is a gas?
particles are free to move around and can collide with each other
What is a compound?
many different elements mixed together
what are the 3 main subatomic particles?
protons, neutrons and electrons
postive and negative
protons and electrons
protons = positive electrons = negative
how many electrons can the first shell hold? and after that?
2 then after that 8
what is the atomic mass number?
the amount of protons and neutrons in an atomic nucleus
what is an ion?
a molecule or atom with a net electric charge?
what happens when atoms react to from compounds?
bonds are formed
what are the two types of bonding?
covalent and ionic
what has no charge and is neutral?
an atom
which number is the number that shows you how many electrons are in the shells over all?
the bottom one
how are bonds formed?
atoms giving away or taking electrons from each other
describe covalent bonding?
compound formed from non-metals and share electrons with another atom
