Groups and Periods
What is the first element in group 2?
Beryllium
What is the center of an atom called?
The nucleus
What particle has a positive charge?
What tells you the number of protons and electrons?
Atomic number
What row is Potassium in?
4
What is the symbol for silver?
Ag
What particle has no charge?
Neutron
What are the horizontal lines on a periodic table called?
What is the name of group 18?
Noble gases
What are atoms made of?
Protons, neutrons, electrons
What particle has a negative charge?
Electron
What are the vertical lines called?
Groups
How many rows are there?
7
What do atoms do?
They join together to form molecules
What particle is not inside the nucleus?
Electrons
The sum of an atoms protons and neutrons is called?
Mass number
What group number are the halogens in?
17
What does the symbol "Pb" stand for?
Lead
What does a proton attract?
An electron
How many elements are on the periodic table?
118