Science Easter Test Flashcards
What is an atom?
The smallest part of an element that can exist.
What is the chemical formula?
A formula that shows the number of atoms of each element in a compound e.g. NaCl, H20, CO2
What is the chemical symbol of an element?
The letter code for an element.
What is a compound?
A substance made up of atoms of two or more elements, strongly joined together.
What in an element?
A substance that cannot be broken down into other substances
What is a molecule?
A group of two or more atoms, strongly joined together.
What is the difference between a compound and a molecule?
A compound is TWO or more DIFFERENT ELEMENTS bonded together,
A molecule is TWO or more ATOMS of the SAME ELEMENT bonded together.
What is the Periodic Table?
A table of all the elements - in which elements with similar reactions (due to the same number of electrons in their outer shell) are grouped together.
