Chemistry 1
What information on the periodic table do you use to find the number of protons?
atomic number
What are the 3 main states of matter?
Solid, liquid, gas
What is the 25th element called?
Manganese or Mn
What is the atomic name for Hg?
Mercury
What is the maximum number of electrons in the first energy level?
What is the atomic number of neon (Ne)?
10
What is the atomic symbol for Lead?
Pb
What is the atomic name for the element with an atomic number of 74?
Tungsten
What is the maximum number of electrons in the second energy level?
8
What is the name for a positively charged subatomic particle?
Proton
What is in the nucleus in the atom?
Protons and neutrons
Some atomic symbols on the periodic table are written in red. What does this represent?
That they are gases.
How many alkali metals are on the periodic table?
6
What is the name for a negatively charged subatomic particle?
Electron
How many groups are in the periodic table?
18
What is the atomic mass of hydrogen?
1.008
When moving from left to right across the periodic table, what increases?
Atomic Number
The sum of protons and neutrons in the nucleus of an atom is known as the _________
Atomic mass
How many periods are shown on the periodic table?
7
What changes in an isotope?
The number of neutrons
What is the maximum number of electrons in the third energy level?
18
How many elements are on the periodic table?
118
What is the difference between an element and a compound?
Element is a substance that consists of one type of atom.
Compound consists of multiple different types of elements such as H20.
What is the unit for atomic mass?
amu (atomic mass unit)
What type of metal is lithium?
Alkali metals
How do you determine the number of neutrons in an element?
Atomic mass - Atomic number (number of protons)
What two letters are NOT seen on the periodic table?
J and Q.
When was the periodic table published?
1869