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Atomic Structure, Masses and Element & Compounds ...

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Element, compound or mixture?

Element

Which one is easy to separate? Compound or mixture?

Mixture

Negatively charged subatomic particle

Electron

You cannot see the different parts that make up this type of mixture.

Homogeneous

Pure substance?

No

True or False? Both letters of a chemical symbol are capitalized.

False

Chemical name for Br

Bromine

Define atom

Smallest particle of an element; Building block of life

These subatomic particles live in the rings of an atom.

Electrons

Mud is a ______ mixture.

Homogeneous mixture

The element that makes up most of Earth's crust.

Oxygen

The number of these subatomic particles can change however it will change the mass of the atom.

Neutrons

Bohr model of Lithium

P=3 E=3 N=4

Bohr model of Oxygen

P=8 E=8 N=8

Electron shell #3 can hold how many electrons?

8 electrons

The element that makes up most of Earth's atmosphere.

Nitrogen

Element, compound or mixture? CO2

Compound

Define compound

Substance composed of 2 or more different atoms that are bonded

Element, compound or mixture? Li

Element

The mass of this subatomic particle is nearly zero

Electron

What type of mixture is air?

Homogeneous

Chemical symbol for Iron

Fe

Element, compound or mixture? Helium

Element

Chemical symbol for Magnesium

Mg

Isotopes of atoms have a different amount of ________.

Neutrons

Name the 2 subatomic particles that contribute to the mass of an atom.

Protons and Neutrons

If the number of these particles change, then the identity of the entire atom changes.

Protons

Compounds are easy or difficult to separate?

Difficult

A salad is what type of mixture?

Heterogeneous mixture