Wild Card
What is the which element has 8 protons?
Oxygen
What do the dots on the orbitals represent?
electrons
What is the name of the group of elements that has a full outer valence shell? (fills octet rule)
What is noble gases
Which subatomic particles are located inside the nucleus of an atom? Hint: mass number
Protons + Neutrons
Draw a lewis dot for He
He with 2 dots (one on each side)
How many protons, neutrons and electrons in Br (Bromine)?
p = 35 e = 35 n = 45
Draw a Bohr Diagram for Sodium.
3 shells
N1=2 N2=8 n3=1
All matter is made of __________ (smallest form of matter).
atoms
How many valence electrons does Ge have?
4
How do you calculate the number of neutrons?
Mass number - Atomic Number
Nucleus weight - protons
Draw a bohr diagram for Nitrogen
7 electrons
1n=2; 2n=5
What are the electrons in the outer orbital called?
Valence Electrons
Does the period or the group tell you how many valence electrons there are?
group
What rule states that atoms prefer to have full outer shells containing eight electrons?
Octet rule
Finish this statement. Bohr diagrams show___________electrons while Lewis Dot structures show _____________electrons.
total electrons and valence electrons.
Explain how you determine the number of electron shells an atom has?
electron shells = period
As you go down the columns the shells increase by 1 with each period.
What are atoms of the same element with different numbers of neutrons called?
Isotopes
Draw a lewis dot for Selenium
Se with 6 spread out electron dots
How many protons, neutrons and electrons in Uranium 239?
P = 92 e = 92 n = 147
Draw a Bohr Diagram for Calcium. How many valence electrons does it have?
2 valence
Draw model: total shells 4
What are the maximum number of valence electrons an element can have with 3 orbitals?
Who proposed that electrons orbit the nucleus like planets orbit the sun?
Niels Bohr
How many valence electrons in Te?
6