Atomic Structure
What is the atom mostly made of?
Empty space
How many periods are in the periodic table?
7
What element has an atomic number of 107?
Bohrium
This theorist coined the term "atomos".
Democritus
An ion is when an atom gains or loses an _________.
electron
Most of an atom's mass is found in the ________.
** DOUBLE JEOPARDY **
Nucleus
How many groups are in the periodic table?
18
How many protons are in a Krypton atom?
36
This theorist conducted the Gold Foil Experiment with his students.
Ernest Rutherford
When an atom has the same number of protons but a different number of neutrons, then it is called ________.
Isotope
This subatomic particle determines the element.
Protons
As you read from left to right, the atomic number _____________ by one.
Increases
Most of the elements on the periodic table are _________.
Metals
This theorist discovered the neutron.
James Chadwick
Carbon - 12 and Carbon - 13 are ________ of each other.
Isotopes
Of the following atoms, which has the most atomic mass?
Iron, Iodine, and Indium
Iodine
What element is in period 6, group 2?
Barium
Chlorine has how many neutrons?
18
This theorist coined the Plum Pudding Model by conducting the cathode ray tube experiment.
JJ Thomson
An ion becomes positively charged if the number of ________ is higher than the number of _______.
Protons , electrons
The electron cloud is where an electron _________ be.
Might / Could
Silver is in group _____ and period _____.
Group 11 Period 5
An ion of Xenon (Xe-4) has ___________ electrons.
58
This person's theory helped develop the electron cloud in the modern atomic theory.
Neills Bohr
If a neutral Helium atom gains 2 electrons, then it's Ion symbol is __________.
He-2