Chemistry 1
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20 Terms
What are atoms
multiple small particles
What is an atoms basic structure
A central nucleus bound by electrons
What is the nucleus made of
2 particles. Protons and neutrons
What is the charge of the proton and neutrons
+1 and neutral
What charge do electrons have
Negative charge -1
What happens when atoms lose or gain electrons
The atom is no longer balanced
What happens when an atom loses its electrons
More positive protons and electrons
What is the number in the top left of the element
Atomic number
What is the number in the top left of the element
The mass number
How do you find the number of neutrons
Mass No - atomic No.
What do the number of protons determine
The element
What is an Isotope
Different forms of the same element the same number of protons and different number of neutrons
What is the sum of relative atomic mass
Isotope abundance x isotope mass / isotope mass
What is a molecule
Group of two or more atoms, held together by chemical bonds
What is a compound
Two or more different elements, held together by chemical bonds
What is a mixture
Two or more substances not chemically combined together.
