No student devices needed. Know more
15 questions
Which sub-atomic particle has a relative charge of -1?
Which sub-atomic particles have a relative mass of 1?
proton
electron
neutron
What is the relative charge of a neutron?
The overall charge of any atom is zero because all atoms have an equal number of positive protons and negative _________.
All atoms of the same element have the same number of _______ in the nucleus.
What is the approximate radius of an atom?
1x10-5 m
1x10-10 m
1x10-15 m
1x10-20 m
What is the approximate radius of a nucleus?
1x10-11 m
1x10-12 m
1x10-13 m
1x10-14 m
The mass number gives the number of __________ in the atom.
protons and neutrons
protons and electrons
electrons and neutrons
neutrons
What is the mass number of sodium?
What is the atomic number of helium?
How many protons are there in an atom of helium?
2
4
6
8
How many neutrons are there in an atom of helium?
2
4
6
8
How many protons are there in an atom of sodium?
How many electrons are there in an atom of sodium?
How many neutrons are there in an atom of sodium?
Explore all questions with a free account