Periodic Table
How is the Periodic table organized?
They are organized by groups and periods.
What are atoms made up of?
Protons
What is a chemical formula?
Its a representation of a substance using symbols for its constituent elements
what is the element for ¨H¨
Hydrogen
What is the symbol for manganese?
Mn
Is everything made up of atoms?
yes
What is matter?
Matter is anything that has mass and occupies space.
What is the atomic number for calcium?
20
When was the periodic table made?
1869
WHat does an atom do?
They join together to form molecules.
what is matter made up of?
Its made up of many atoms.
What is the symbol for boron?
B
how many groups are there?
18
What are the three different subatomic particles inside atoms?
Protons, neutrons, and electrons
How are chemical formulas formed?
They are formed by elements
how many periods are in the periodic table
7
Who discovered atoms
J.J Thomson
Is matter all around us?
Yes because its air