Protons, Neutrons & Electrons
What is the charge of a proton?
Positive
The atomic number tells you the number of ______.
Protons
The nucleus contains which two particles?
Protons and neutrons
What is the element symbol for Oxygen?
O
True or False: Electrons are found in the nucleus.
False
Which subatomic particle has a negative charge?
Electron
What is the atomic mass of an atom with 6 protons and 6 neutrons?
12
What is the charge of the nucleus as a whole?
Positive – because of protons
What is the element symbol for Hydrogen?
H
What particle determines the identity of an element?
The number of protons
Where are neutrons located in an atom?
In the nucleus
How do you calculate the number of neutrons?
Atomic mass – Atomic number
What part of the atom contains almost all of its mass?
The nucleus
True or False: The element symbol for Carbon is Ca.
False - C
What is the element symbol for Boron?
B
How many electrons does a neutral atom of Carbon (atomic number 6) have?
6
If carbon has an atomic number of 6 and an atomic mass of 14, how many neutrons does it have?
8 neutrons
An atom has 15 protons and 16 neutrons. What is its mass number?
31
Element symbols are always written with the ______ letter capitalized.
First letter
An atom has an atomic number of 12 and an atomic mass of 24. How many neutrons does it have?
12 neutrons
Which two subatomic particles are found in the nucleus?
Protons and neutrons
How do you calculate atomic mass?
Protons + Neutrons
Why is the nucleus considered very dense?
Because protons and neutrons are tightly packed in a tiny space
Which of these is the correct symbol for Sodium? So, Sd, Sa, Na
Na
What is the element symbol for Nickel?
Ni