Chemical formula Flashcards
How can chemical formula help us ?
It tell us the number of atom.
What does symbol tell you in periodic table ?
They tell you the element each element has its oan chemical symbol.
Why in some symbol have number ?
It tell us the number of atom.
Why does compound has bracket ?
It’s use by chemists to work out how atoms bond together.
What are chemical formula ?
A chemical formula is a way of expressing information about proportions of atoms.
What is valency ?
Valency is the combing power of an element .
What is different between metals and non-metals?
Metals lose their outer shell of electrons and non-metals fill their outer shell of electrons.So metals atoms become positively charge tons and non-metals atons become negativelly charge tons.
What happen if atom lose a electrons ?
When an atom lose electrons its been oxidiseductive.
What happen if atoms gains electrons ?
When an atom gains electrons it’s been reduced.
What happen if metal react with non-metals ?
They will make ionic compound.
