Round 1
What are the three sub-atomic particles in an atom
Protons, Neutrons, and Electrons
What is the center of an atom called?
The Nucleus
If atoms contain charged particles, why do they not have a charge?
They contain the same number of protons as electrons
Where are Alkali Metals found
Group 1
What is an atom?
An atom is the smallest indivisible particle of an element
Which of the three sub-atomic particles is the lightest?
The Electron
What is the charge on an electron?
Negative
The total number of protons and neutrons in an atom's nucleus
Mass Number
Which elements have similar chemical properties?
Elements with the same number of electrons in their outer energy level
Which of the following has a positive charge?
Proton
The particle with no charge in the nucleus
Neutron
Hydrogen has three isotopes and a relative atomic mass of 1.0079. Which isotope is the most abundant?
Hydrogen with atomic mass of 1
Where are the electrons inside an atom?
The electrons orbit around the nucleus and are arranged into energy levels.
What are isotopes?
Isotopes are atoms of the same element with the same atomic number but a different mass number.
What gives an atom its mass?
Protons and neutrons
A balanced (neutral charged) atom has equal numbers of ____ and _____
Protons and electrons