atomic bombs
What is an atom?
What is the smallest unit of matter
What determines the identity of an element?
Protons
How do you calculate mass number?
Protons + neutrons
What must be true for an atom to be neutral?
Protons = electrons
What is a group on the periodic table?
A column
Name the three subatomic particles?
What is Protons, neutrons, electrons
An atom has 6 protons. What element is it?
Carbon
What is the mass number of:5 protons, 5 neutrons?
10
What is a period?
A row
Where are protons and neutrons located?
Nucleus
If an atom has 8 protons, what element is it?
Oxygen
What is the mass number of:6 protons, 7 neutrons?
13
An atom has 10 protons and 8 electrons.What is the charge?
+2
Why are elements in the same group similar?
Similar properties / same outer electrons
Which particles are found in the nucleus?
Protons and neutrons
If an atom changes from 7 protons to 9 protons, what happens?
It becomes a new element
An atom has a mass number of 20 and 8 protons.How many neutrons?
12
An atom has 8 protons and 10 electrons.What is the charge?
-2
What is one property of metals?
Conduct electricity / shiny
Which particle has a negative charge and what is its role?
Electron — involved in reactions/bonding
Why do protons determine the identity of an element?
Each element has a unique number of protons
Two atoms have the same number of protons but different neutrons.Are they the same element? Explain.
Yes, same element (different mass)
Why does changing electrons NOT change the element?
Because protons determine identity
Why is the periodic table organized by atomic number instead of mass?
Because protons determine the element