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Chemistry 10

Atomic Sructure

Atomic Number The number of protons in the nucleus of an element.
Isotopes Atoms with the same number of protons but different number of neutrons.
Neutrons Subatomic particles with no charge.
Atom The smallest particle of an element that retains its identity in a chemical reaction.
Electrons Negatively charged subatomic particles.
Group A vertical column of elements in the periodic table.
Nucleus Central core of an atom, which contains most of the atom's mass.
Periodic Table An arrangement of elements according to similarities in their properties.
Protons Positively charged subatomic particles.
What are the two regions of an atom? Nucleus and electron cloud.
What region of the atom has the greatest mass? Nucleus.
What region of the atom has the greatest density? Nucleus.
What region of the atom has the largest volume? Nucleus.
What holds the regions of the atom together? Electromagnetic force.
What holds the nucleus together? Neutrons.
The mass of number is equal to the what? Neutrons + Protons.
The atomic number is equal to the what? Protons.
Which subatomic particle determines an element's chemical properties? Electrons.
Which subatomic particle determines an elements identity? Protons.
What is Avogadro's number? 6.02 x 10 to the 23.
Molar Mass The weighted average of the naturally occurring isotopes.
The atomic number tells you the number of what? Protons.
No two different elements will have the same what? Atomic number.
The mass number is used to calculate the number of what, in one atom of an element? Neutrons.
In order to calculate the number of neutrons you must subtract the what from the what? Protons from the mass number.
Moles to grams you do what? Multiplication.
Grams to moles you do what? Divide.
When doing density problems what equation do you use. D = m/v.
Created by: sheeba1cindy



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