Atomic Theory
Which atomic particles are around the nucleus within an atom?
Electrons
It indicates the number of protons inside an atom
Atomic Number
Arrange the next elements from the most to the least electronegative: Bromine, Fluorine, Iodine, Chlorine
F, Cl, Br, I
How many principal energy levels an atom might have?
7
It is the tendency for the atoms to have eight electrons in their last principal energy level.
The Octet Rule
Which atomic particles form the nucleus within an atom?
Protons and Neutrons
It indicates the sum of protons and neutrons inside an atom
Mass Number
Arrange the next elements from the one with the lowest to the highest ionization energy: Strontium, Beryllium, Calcium, Magnesium
Sr, Ca, Mg, Be
What are the names of the 4 energy sublevels an atom might have?
s, p, d, f
Is an electrically charged atom of an element formed by losing or gaining one or more electrons to complete the octet rule.
An Ion
Who was the scientist that confirmed Democritus atomic model?
John Dalton
If an atom of Chlorine (Cl) has 17 protons and 20 neutrons, what is its mass number?
37
Arrange the next elements from the one with biggest to the smallest atomic radius: Sodium, Hydrogen, Potassium, Lithium, Rubidium
Rb, K, Na, Li, H
What is the electron configuration for Sodium (Na)
1s2 2s2 2p6 3s1
Sodium (Na) is at group 1A, how many valence electrons does it have to lose to complete the octet rule?
1
Who was the first scientist to discover the existence of the nucleus inside the atom?
Ernest Rutherford
If an atom of Nickel (Ni) has an atomic number of 28 and a mass number of 59, how many neutrons does it have?
31
Arrange the next elements from the least to the most electronegative: Chromium, Zinc, Calcium, Bromine, Nickel, Iron
Ca, Cr, Fe, Ni, Zn, Br
What is the electron configuration for Cobalt (Co)
1s2 2s2 2p6 3s2 3p6 4s2 3d7
Oxygen (O) is at group 6A, how many valence electrons does it have to gain to complete the octet rule?
2
Who was the first scientist that stated electrons moved around the nucleus in orbits of fixed sizes and energies?
Niels Bohr
If an atom of Platinum (Pt) has an atomic number of 78 and a mass number of 195, how many neutrons does it have?
117
Arrange the next elements from the one with the highest to the lowest ionization energy: Sulfur, Silicon, Sodium, Aluminum, Magnesium, Chlorine, Phosphorus
Cl, S, P, Si, Al, Mg, Na
What is the electron configuration for Cadmium (Cd)
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10
Neon (Ne) is at group 8A, how many valence electrons does it have to gain to complete the octet rule?
0