Parts of the Atom
History of the Atom
Average Atomic Mass
Previous Unit
Phase Changes
100
This atomic particle is found in the nucleus and has a positive charge.
What is a proton?
100
Democritus was the first person to name the atom, calling it 'atomos' which means this.
What is indivisible?
100
Based on the information below calculate the average atomic mass of the element below.
- Isotope 1:
Mass = 10.01 amu, Abundance = 20.0% - Isotope 2:
Mass = 11.01 amu, Abundance = 80.0%
What is 10.81 amu?
100
This type of change alters the size, shape, texture, or state of matter without changing its molecular structure.
What is Physical Change?
100
This type of change happens when you have a solid become a liquid.
What is melting?
200
This atomic particle is found in the nucleus and has a neutral charge.
What is a neutron?
200
This model of the atom was the first to introduce the concept of an atom containing positive and negative charges.
What is the plum pudding model?
200
Based on the following information calculate the following average atomic mass.
- Isotope 1:
Mass = 34.97 amu, Abundance = 75.76% Isotope 2:
Mass = 36.97 amu, Abundance = 24.24%
What is 35.45 amu?
200
Provide 3 examples of physical changes.
What are.....
Melting ice, Boiling water, Freezing water, Dissolving salt in water, Stretching a rubber band, Cutting wood, Tearing paper, Breaking a glass, Grinding wood into sawdust, Crushing a can, etc.
200
This type of change occurs when a liquid becomes a gas.
What is vaporization?
300
Electrons are a subatomic particle with a negative charge and is located in this space.
What is the Electron Cloud?
300
This is the central idea that came out of Rutherford's Gold Foil experiment.
What is atoms are mostly empty space and most of the mass is in the middle?
300
Using the following information determine the average atomic mass of the following isotopes.
Neon-20:
19.99 amu at 90.9%Neon-21:
20.99 amu at 0.3%Neon-22:
21.99 amu at 8.8%
What is 20.17 amu?
300
This type of change happens when one or more substances turn into entirely different substances with new chemical properties.
What is a chemical change?
300
This type of change that occurs when a gas becomes a liquid.
What is condensation?
400
Identify the missing piece of information from the information below:
Name: Silicon
Atomic Number:14
Mass Number: ____
Protons: 14
Neutrons: 15
Electrons: 14
What is 29?
400
Neils Bohr created out second newest model of the atom which was designed based around this idea for electrons.
What is they are on set paths around the nucleus?
400
Element X has two isotopes. Isotope-10 has a mass of 10.01 amu and Isotope-11 has a mass of 11.01 amu. The average atomic mass of Element X on the periodic table is 10.81 amu. Find the percent abundance of each isotope
What is Isotope-10 has 20% and Isotope-11 has 80%?
400
Provide 3 examples of a chemical change.
400
This type of change occurs when a gas becomes a solid.
What is deposition?
500
Identify the missing piece of information from the information below:
Isotopic Symbol: 122/51 Sb ^-3
Atomic Number: 51
Mass Number: 122
Protons: 51
Neutrons: _____
Electrons: _____
What are 71 neutrons and 54 electrons?
500
This model of the atom is the newest and was given to us by this individual. It shows a central nucleus and is surrounded by and "electron cloud".
Who is Schrodinger?
500
Element "Q" has five natural isotopes of 65Q with 61.9% abundance and mass 64.92 amu, 66Q with 24.18% abundance and mass 65.96 amu, 67Q with 7.63% abundance and mass 66.99 amu, 68Q with 2.87% abundance and mass 67.97 amu, and 69Q with 3.42% abundance and mass 68.99 amu. What is the average atomic mass of this element to the hundredths place?
What is 65.56 amu?
500
Name the four clues that a chemical change has occured.
What is transfer of energy, a change in color, the production of a gas, or the formation of a precipitate?
500
This type of change occurs when plasma becomes a gas.
What is deionization?