Atomic Structure
Which scientist discovered that electrons where separated into energy levels?
Bohr
The atomic number tells us the number of ________.
Protons
What is the charge of an electron?
Negative (-1)
What are the columns (up and down) of the periodic table called?
Groups
Which atom has more protons?
Se or Br
Br
Which scientist organized the periodic table by size?
Protons 12
Neutrons 14
Electrons 10
What is the Atomic Mass?
26 amu
How many electrons can the n=1 shell hold?
2
What are the rows (left and right) of the periodic table called?
Periods
Which element has the greatest Atomic Radius?
Fe, Be, Si
Be
Where are electrons found?
The shells/ energy levels
An atom has
27 protons
+3 charge
How many electrons does it have?
24
How many electrons fit into the 2nd shell?
Which period is Boron (B) in?
Period 2
Which atom has the greatest electro negativity?
Al , Cl, Na
Cl
Which subatomic particles are in the nucleus?
Protons and Neutrons
Protons 12
Neutrons 14
Electrons 10
What is the charge?
+2
How many energy levels does CS Cesium have?
6
How many energy levels does Calcium (Ca) have?
4
Which atom has the lowest electron affinity?
Sr, Be, Ra
Ra
Which scientist discovered protons using gold foil?
Rutherford
An atom has
5 protons
-2 charge
How many electrons does it have?
7
How many Valence Electrons does Sulfur (S) have?
6
Which metalloid is used in computers?
Silicon (Si)
List the elements from least to greatest reactivity:
Sulfur (S), Oxygen (O), Fluorine (F)