Atomic structures Flashcards
Why are atoms neutral
There are the same number of protons and electrons
What is the atomic number
The number of protons
What is the mass number
The number of protons and neutrons
Are protons positive or negative
Positive
Are electrons positive or negative
Negative
Where are the protons, neutrons and electrons located
The protons and neutrons are found in the nucleus and the electrons are around the edge
What does AMU start for
Atomic mass unit
What is in the periodic table
A table of chemical elements, arranged by atomic number
Which group number is alkali metals
Group 1
What is group 7
Halogens
What is group 0
Noble gases
What is an isotope
Atoms with the same atomic number but different mass numbers
What is the mass of a proton
1 amu
How do you know which element goes first
The one nearest the left comes first
What is the mass of a neutron
1 amu