Atoms
Atoms 2
Elements and atoms
Periodic Table 1
Periodic Table 2
50
All neutrons are
neutral"
50
What is the electrical charge of the nucleus.
positive (however many protons)
50
How can you tell, from the periodic table, how many energy levels an atom has?
Count the periods (horizontal rows)
50
How many periods are in the periodic table?
7
50
On a periodic table there are ____ many groups
What is "18 groups"
150
All protons are _____________
"positively charged particles"
150
The sum of the protons and neutrons in an atom's nucleus is its _______________.
What is "mass number"
150
What has changed in an isotope?
neutrons and mass
150
What makes an atom stable
full shells (8 electrons)
150
Draw the Bohr model for Boron
Teacher will check
250
What are the 3 subatomic particles and their charges
proton (+), Neutron (o) and Electrons (-)
250
The greatest number of electrons an atom can hold in its second energy level is ______________
What is "8"
250
What is the charge of a neutron?
What is "no charge" or "neutral"
250
On a periodic table, the horizontal row of elements is called __________
What is "the periods"
250
How many energy levels does an element in period 4 have?
4
350
How many neutrons does Chlorine have?
18 (35-17)
350
What changes in an ion?
Electrons no longer equal protons
350
What is the electric charge of an electron?
negative charge
350
What element is in group 14 period 2
Carbon
350
How many valence electrons does Potassium (K) have?
1 v.e.
450
What determines the atomic number of an element?
protons in the nucleus of an atom
450
Where on the periodic table can we find how many valence electrons an atom has?
The group number (-10 for groups 13-18)
450
Elements in the same vertical column (group / family) have __________
What is "similar” characteristics.
450
Element in Period 6 Group 16 has an atomic number of ___.
84
450
What group and period would this atom be in
Group 7, period 3