Atomic Theory
Who discovered the electron embedded in a "plum pudding" positively area?
JJ Thomsom
You notice there is a Bohr model drawn for an element with 18 electrons and a mass number of 40. How many neutrons does this element have?
22
To find another element with similar properties as carbon, you would look where?
The same group
Arrange the following from lowest to highest frequency: green light, microwaves, UV light, radio waves.
radio waves, microwaves, green light, UV light
Draw the Lewis Dot diagram of Sulfur.
S with 6 dots
Who came up with the planetary model of the atom where electrons are arranged in different energy levels?
What is the difference between a carbon-12 and a carbon-14?
The number of neutrons
Which family is sitting in group 2 of the periodic table?
Alkaline Earth Metals
All electromagnetic waves travel at which speed?
Speed of light (300,000,000 meters per second)
Wha the Lewis dot diagram for an element that has the following electron configuration?
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p3
As with 5 Dots
Who conducted the famous gold foil experiment discovering that atoms are mostly empty space?
Ernest Rutherford
What is the nuclear isotope symbol of iron if there was only naturally occurring isotope?
5626Fe
Which is the most reactive metal in the Alkali Metal family?
Francium
Which type of wave has the highest frequency?
Gamma Rays (Cosmic Rays)
What is the electron configuration of an atom that has a Bohr Diagram with 15 dots in the picture.
1s2 2s2 2p6 3s2 3p3
What did Dmitri Mendeleev predict (about the undiscovered elements) that helped him arrange the periodic table when understanding that there were gaps of undiscovered elements?
Their physical and chemical properties
A neutral calcium atom has 20 protons and 20 neutrons. How many electrons does a Calcium ion (Ca2+) have?
18
What is one trait of the Halogens?
Most reactive Non-metals or 7 valence electrons
Which one would have a shorter wavelength, blue light or x-rays?
X-Rays
C, Si, Ge, Sn, Pb
Who discovered that there is a positively charged nucleus with mostly empty space around it?
You are tasked to find the average atomic mass of an unknown sample. Turns out that the sample has 3 isotopes within it. There is an isotope with a mass of 23.98501417 and an abundance of 78.99%. Another has a mass of 25.98259292 with an abundance of 11.01%. The other mass of 24.98583692 has an abundance of 10.00%. Calculate the average atomic and identify the element.
Magnesium with an atomic mass of 24.30502
Which is the least reactive metal family on the Periodic Table?
Transition Metals
How are Energy of a wave and Frequency related to one another?
They are directly proportional to each other.
Place elements from highest to lowest first ionization energies: Ba, Cl, Sb, P
Cl > P > Sb > Ba