Atoms - Science Final Test Review APS 8th grade

Match the following

• the small positively charged center of an atom

• electron

• particle with a negative charge

• proton

• particle with a positive charge

• atom

• the smallest particle of an element

• nucleus

• electronically neutral particle

• neutron

Isotopes

• particles of matter that makes up protons and neutrons

• elements with a different number of neutrons

• Coincide with the number

quarks

• particles of matter that makes up protons and neutrons

• elements with a different number of neutrons

• Coincide with the number

energy levels

• particles of matter that makes up protons and neutrons

• elements with a different number of neutrons

• Coincide with the number

Nombra los modelos

e

d

c

b

a

Thompson "Plum Pudding Model"

Rutherford Model

Quantum Mechanical Model

Bohr Model

Dalton "Billiard Ball Model"

Match the following

• Attraction formed between atoms when they share electrons.

• Chemical Formula

• Chemical shorthand that uses symbols to tell what elements are in a compound and their ratios.

• Chemical Bond

• The force of attraction between the opposite charges of the roots in an ionic compounds.

• Ion

• Charged particles that have either more or fewer electrons than protons.

• Covalent Bond

• Force that holds atoms together in a compound.

• Ionic Bond

Match the following

• A covalent bond in which electrons are shared equally by both atoms.

• Molecules

• A neutral molecule in which unequal electron sharing results a slight positive end and negative end.

• Non Polar Molecule

• A neutral particle that form as a result of electron sharing among atoms.

• Ion Polar Bond

• A covalent bond in which the electrons are not shared equally resulting in a slightly negative end.

• Polar bond

• Molecule that shares electrons equally and does not have opposite charge end.

• Polar molecule

Positive or negative number that indicates how many electrons an atom has gained, lost or shared to become stable.

• Oxidation number

• Binary compound

Compound that composed of two elements.

• Oxidation number

• Binary compound

Match the following

• It is often referred to as the billiard ball model. He defined an atom to be a ball-like structure.

• Thompson Plum pudding model

• Specifies the probability of finding an electron in the three-dimensional space around the nucleus

• Rutherford's Model

• Atom is made up of a positively charged sphere into which negatively charged electrons are implanted

• Quantum Mechanical Model

• Found that an electron located away from the nucleus has more energy, electron which is closer less.

• Bohr Model

• Atom is described as a tiny, dense, positively charged core called a nucleus.

• John Dalton Model