The Atom Flashcards
1
Q
How do you calculate the number of protons of an element?
A
Use the atomic number
2
Q
How do you calculate the number of electrons of an element?
A
The number of electrons is equal to the number of protons in an atom.
3
Q
How do you calculate the number of neutrons in an element?
A
Take the atomic number away from the atomic mass number.
4
Q
What is an isotope?
A
Atoms of the same element with different number of neutrons.
5
Q
One mole of a substance is the relative formula mass in
A
grams
6
Q
The relative atomic mass of an element compares the mass of an atom with the mass of an atom of
A
Carbon
7
Q
What is the relative formula mass?
A
The mass of all the atoms in the molecule added together.
8
Q
What is the relative formula mass of NaCl?
A
58.5
9
Q
What is the percentage of sodium in NaCL?
A
39%
