Subatomic particles
Atomic numbers and mass
Isotopes and Ions
Periodic Table and Atomic Mass
Calculations and Symbols
100
Three subatomic particles in the and their charges.
What are protons (+ charge), electrons (- charge) and neutrons (0 charge)?
100
The number of protons in an atom.
What is atomic number?
100
The definition of an isotope.
What are atoms of the same element with different numbers of neutrons?
100
This number on the periodic table shows the number of protons in an element's atoms.
What is atomic number?
100
This is the formula that you use to calculate the neutrons in an atom.
What is mass # = protons + neutrons?
So what is mass # - protons = neutrons?
200
Protons, neutrons and electron locations in the atom.
What is the nucleus for protons and neutrons and what is the electron cloud (in orbitals) for electrons?
200
Protons + Neutrons - a whole number
What is mass number?
200
To create an isotope, the number of these subatomic particles changes.
What are neutrons?
200
This number on the periodic table measures the mass of an atom, which mostly consists of protons and neutrons. It is also a weighted average of the masses of an element's isotopes.
What is atomic mass?
200
An atom has an atomic number of 15 and a mass number of 31. This atom has ________ neutrons.
mass # - protons = neutrons
31 - 15 = 16 neutrons
300
The number of these particles determines the identity of an element (its name)
What are protons?
300
The mass number of an atom with 20 protons and 30 neutrons.
What is 50?
300
This is how isotopes of the same element are similar and how they are different.
What are the similar - number of protons and what are different - neutrons and mass numbers.
300
75% of chlorine (Cl) atoms are the isotope Cl-35 and 25% are Cl-37. Of these two isotopes, this one impacts the atomic mass more.
What is Cl-35?
300
The nuclear symbol for this element is below. It has _____ protons, ______ neutrons and a mass number of ____________.
What is helium with 2 protons, 2 neutrons and a mass number of 4.
400
The relative masses in amu of protons, neutrons and electrons.
What is approximately 1 amu each for protons and neutrons and what is approximately 0 amu for electrons? (The point is, protons and neutrons make up most of the atom's mass, while electrons are so small their mass is very close to 0 amu)
400
These elements from lowest to highest atomic number.
Rb, Sn, Br, N
What is: N<Br<Rb<Sn
400
This atom has 12 protons and 10 electrons. It is (an ion or neutral) with a charge of ____________.
What is an ion with a charge of +2. (Originally, the atom had 12 protons and 12 electrons and was neutral. Then it lost two electrons, making it more positively charged than negatively charged. Practice creating positive and negative ions on the Build the Atom simulation)
400
Why there is only one atomic mass per element on the periodic table, even though each element has multiple isotopes.
What is the weighted average of the isotopes of that element?
400
The atom below is (an ion or a neutral atom) and has _____ protons and _____ electrons.
What is an ion with 8 protons and 10 electrons. (Remember, it is the electrons that change to form an ion)
500
Loss or gain of one or more of these particles leads to formation of an ion.
What are electrons?
500
Difference between atomic mass on the periodic table and the atomic mass of a single isotope.
What is the weighted average the mass of isotopes of an element versus the mass of a single isotope.
500
Out of these three atoms - atom A (6p, 6n), atom B (6p, 8n) and atom C (7p, 7n), these two atoms are isotopes.
What are atom A and atom B?
500
Using atomic mass data, this is how you could approximate the mass of the most common isotope of an element.
What is the most abundant isotope that has an atomic mass closest to the value on the periodic table?
500
This chromium atom has this many electrons. Use your periodic table.
On the periodic table, a neutral chromium atom has 24 protons and 24 electrons. This atom has a symbol of 4+, which means it has lost 4 electrons. So it has 24 - 4 = 20 electrons.