Atomic Theory
Which atomic particles are around the nucleus within an atom?
Electrons
It indicates the number of protons inside an atom
Atomic Number
Triple Points!!!
If Hg atomic number is 80, how many protons does the Isotope Hg-201 have?
80
How are called the vertical columns in the periodic table?
Groups
Arrange the next elements from the most to the least electronegative: Bromine, Fluorine, Iodine, Chlorine
F, Cl, Br, I
Which atomic particles form the nucleus within an atom?
Protons and Neutrons
Triple Points!!!
It indicates the sum of protons and neutrons inside an atom
Mass Number
If Mg atomic number is 12, how many electrons does the Isotope Mg-26 have?
12
Double Points!!!
How are called the horizontal rows in the periodic table?
Periods
Arrange the next elements from the one with the lowest to the highest ionization energy: Strontium, Beryllium, Calcium, Magnesium
Sr, Ca, Mg, Be
Double Points!!!
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
If I atomic number is 53, how many neutrons does the Isotope I-127 have?
74
What's the name of the Russian chemist who first arrange the elements in a periodic table?
Dmitri Mendeleev
Arrange the next elements from the one with biggest to the smallest atomic radius: Sodium, Hydrogen, Potassium, Lithium, Rubidium
Rb, K, Na, Li, H
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
Silver (Ag) has two naturally occurring isotopes: Ag-107 (51.84%) and Ag-109 (48.16%). What is Silver atomic mass?
107.96 amu
How many periods are there in the periodic table?
7
Double Points!!!
Arrange the next elements from the least to the most electronegative: Chromium, Zinc, Calcium, Bromine, Nickel, Iron
Ca, Cr, Fe, Ni, Zn, Br
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
Strontium (Sr) has four naturally occurring isotopes: Sr-84 (0.56%), Sr-86 (9.86%), Sr-87 (7.00%) and Sr-88 (82.58%). What is Strontium atomic mass?
87.71 amu
How many groups are there in the periodic table?
16
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