Matter and Mass
Anything that has mass and takes up space is called...
Matter
This subatomic particle has a positive charge.
Proton
The two subatomic particles in the nucleus are...
Protons and Neutrons
The number of these in an atom determines its identity.
number of protons
Atoms with the same number of protons but different number of neutrons are called...
Isotopes
The amount of matter in a object is the object's...
Mass
There are two particles. One particle has a mass of 0amu and the other has a charge of 0 what are they?
Electron and Neutron
The overall charge of a nucleus is...
A) Neutral
B) Positive
C) Negative
B) Positive
The sum of the protons plus neutrons is called the....
Mass number
There is Carbon-12 and Carbon-14. The numbers 12 and 14 represent?
The mass numbers
What is Chemistry?
The study of matter and the way it changes
What does the word sub mean in the word subatomic?
beneath, under
How large is the nucleus of a atom?
1 femtometer( 10^-15 m)
An atom contains 15 protons. How many electrons must the atom have so that the overall charge is -8?
23 electrons
What is the atomic number of a element?
The number of protons in the nucleus.
Between mass and weight this one changes based on gravity.
Weight
This part of the atom contains the mass of the atom.
Nucleus
As atoms get heavier (higher atomic numbers), they require more of this specific particle to act as a "buffer" and keep the nucleus stable.
Neutrons
Why are atoms on a periodic table almost never whole numbers?
Because atomic masses are determined by the abundances of each isotope of a element.
The weighted average of all an element's isotopes.
the atomic mass
This is the most basic unit of matter that can't be "broken" down any further.
Atom
The number of protons inside of the nucleus is called
Atomic number
Who is the scientist who did the gold foil experiment? What did the experiment prove?
Ernest Rutherford; the experiment proved that atoms are mostly empty space with a very small densely charged nucleus.
A element has 2 mass numbers. One has a mass number of 1000 with a abundance of 60% while the other has a mass of 1004 with a abundance of 40%. Find the atomic mass of the element.
1001.6 amu
Silver has two naturally occurring isotopes: Ag-107 and Ag-109. If the average atomic mass is 107.87 amu, identify which isotope is more abundant in nature.
Ag - 107 because it is closer to the atomic mass