History
Counting
Ions/Valence Electrons
Vocab
Periodic Trends
100
Who is considered to be the father of the Periodic Table?
Mendeleev
100
What is the atomic number for H-3
1
Hydrogen has 1 proton
100
Non-metals tend to ________ electrons to become ________
Non-metals tend to gain electrons to become anions
100
True or False:
The Mass Number is represented on the periodic Table
False
The Average atomic Mass is represented.
100
In general, which group has a higher electronegativity; alkali metals or halogens
Halogens
200
Which scientist believed that all atoms of an element are identical?
Dalton
200
How many more neutrons than protons does C-14 have?
2
Carbon has 6 protons (atomic number)
Mass Number= 14
14-6=8 Neutrons
8-6=2
200
How many valence electrons does Br+ have?
6
Br is in group 7, so 7 valence electrons.
Charge of plus 1, so lost one valence electron
200
True or False:
Na+ has an octet.
True
200
Which Non-metal is more reactive?
F or I
F
Non-reactivity increases as go up a group and to the right across a period
300
What experiment did Rutherford perform?
What did he discover?
Gold Foil Experiment
Discovered positively charge nucleus
300
What is the isotope notation for an isotope with 23 protons and 24 neutrons?
4723V
or
V-47
300
What is the charge of Phosphorus when it becomes an ion?
3-
P is in group 5, so 5 valence electrons. Needs to gain 3 electrons to achieve an octet. Electrons are negatively charged.
300
True or False:
A Cation is bigger than its original atom.
Ex: Na+ is bigger than Na
False
Cations are smaller because they lose their valence shell
300
Which has the highest Ionization Energy?
Na, S , Cl
Cl
400
True or False
Mendeleev ordered his periodic table in order of increasing atomic mass
True
400
How many protons, electrons, and neutrons does the following neutrally charged isotope have?
13255CsP:55
E:55
N:77
400
When Alkaline Earth Metals become an ion, what charge do they have?
2+
Group 2, so 2 valence electrons. Lose 2 electrons to achieve octet. Electrons are negative, so losing them gives you a positive charge.
400
Elements in the same period have the same number of __________.
Electron shells or energy levels
400
In general, Which group has the highest electronegativity?
Alkali Metals, halogens, Noble Gases
Transition Metals
Noble gases are farther to the right, but already have an octet, so they are happy with the electrons they have.
500
What was JJ Thomson's:
1. Model
2. Experiment
3. Discovery
1. Plum Pudding
2. Cathode Ray Tube
3. Electron
500
S-34 has an overall charge of 2-
How many protons, electrons, and neutrons does it have?
P: 16
E: 18
N: 18
500
Which of the following Has an octet (enter all the Apply):
A. Ne B. Al+2
C. O- D. Cl-
A, D
500
An atom's ability to steal an electron in a bond is called _________
Electronegativity
500
Put the following in order of increasing (smallest to largest) atomic radius
Sr, N, F, Li, K
F, N, Li, K, Sr