Atoms Flashcards
1
Q
What’s a Nanometer (in metres)
A
1 x 10-9 m (to the power of -9)
2
Q
Does the nucleus contain both protons and neutrons?
A
Yes- they are in the middle of an atom
3
Q
Are Electrons positively or negatively charged?
A
Negatively
4
Q
Where are electrons located in an atom?
A
They move around the nucleus.
5
Q
What charges do Protons, Neutrons, and Electrons have?
A
Protons- Positive charges
Neutrons- Neutral charges
Electrons- Negative charges
6
Q
Is the relative mass of an element not the same as its mass number?
A
No- relative mass is the same as is mass number
7
Q
Atomic number formula = ?
A
Number of protons
8
Q
Mass number formula = ?
A
Number of protons + number of neutrons
9
Q
Number of neutron formula?
A
Mass number - atomic number
