Chemistry Flashcards
Section 1 of Exam
What is the first group on the periodic table known as?
Alkali Metals
What is the second group on the periodic table known as?
Alkaline Earth Metals
What is group seven on the periodic table known as?
Halogens
What is group eight on the periodic table known as?
Noble gases
What is shell shielding?
The more shells in-between the electrons and the nucleus the weaker the bond and the more shell shielding.
What charge do neutrons have?
No charge (neutral)
What charge do electrons have?
Negative charge (-)
What charge do protons have?
Positive (+)
What is the atomic number?
The number of protons in an atom.
What is the atomic weight?
The number of protons + neutrons.
How do you find then number of electrons?
It is the same number as protons.
How do you find the number of neutrons?
Atomic weight - Atomic number.
How do you find the number of protons?
The atomic number.
How are elements arranged on the periodic table?
In atomic number order.
What is all matter made up of?
Atoms.
What subatomic particles are found in the nucleus?
Neutrons and protons.
What subatomic particle orbits the nucleus?
Electrons.
Who invented the Solid Ball model?
Democritus.
What model did Democritus invent?
The Solid Ball model.
Who invented the Plum Pudding Model?
JJ Thompson.
What model did JJ Thompson invent?
The Plum Pudding model.
Who invented the Nuclear model?
Ernst Rutherford.
What model did Ernst Rutherford invent?
The Nuclear model.
Who invented the Planetary model?
Neils Bohr.