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Atomic Structure, Masses and Element & Compounds ...
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The element that makes up most of Earth's crust.
Oxygen
The element that makes up most of Earth's atmosphere.
Nitrogen
What type of mixture is air?
Homogeneous
You cannot see the different parts that make up this type of mixture.
Homogeneous
The number of these subatomic particles can change however it will change the mass of the atom.
Neutrons
Name the 2 subatomic particles that contribute to the mass of an atom.
Protons and Neutrons
True or False? Both letters of a chemical symbol are capitalized.
False
Chemical symbol for Magnesium
Mg
Which one is easy to separate? Compound or mixture?
Mixture
Compounds are easy or difficult to separate?
Difficult
Element, compound or mixture?
Element
Pure substance?
No
Element, compound or mixture? Li
Element
Element, compound or mixture? CO2
Compound
Element, compound or mixture? Helium
Element
Define compound
Substance composed of 2 or more different atoms that are bonded
Mud is a ______ mixture.
Homogeneous mixture
A salad is what type of mixture?
Heterogeneous mixture
Isotopes of atoms have a different amount of ________.
Neutrons
The mass of this subatomic particle is nearly zero
Electron
Bohr model of Lithium
P=3 E=3 N=4
Bohr model of Oxygen
P=8 E=8 N=8
Negatively charged subatomic particle
Electron
Electron shell #3 can hold how many electrons?
8 electrons
Define atom
Smallest particle of an element; Building block of life
Chemical name for Br
Bromine
Chemical symbol for Iron
Fe
If the number of these particles change, then the identity of the entire atom changes.
Protons
These subatomic particles live in the rings of an atom.
Electrons
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