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Atomic Models
History of Atomic Theory
Subatomic Particles
Ions
Isotopes
Average Atomic Mass
200

This scientist officially proposed the first atomic theory.

Who is DALTON?

200

Dalton believed atoms combined in whole number ratios, were indivisible, and _______.

What are IDENTICAL?

200

This subatomic particle determines the element's identity.

What is the PROTON?

200
This term refers to an atom with unequal protons and electrons.

What is an ION?

200
This term refers to atoms of the same element that have different neutrons.

What is an ISOTOPE?

200

This refers to the weighted average of all isotopes of a given element.

What is AVERAGE ATOMIC MASS?

400

His model was the "plum pudding model"

Who was THOMSON?

400
J.J. Thomson discovered this subatomic particle.

What is the ELECTRON?

400

The mass of a neutron is this many amu

What is 1 AMU?

400

The positive ion is called this.

What is a CATION?

400
This isotope of carbon is radioactive.

What is CARBON-14?

400

Chlorine's mass is 35.5amu which is a mix of Cl-37 and this other isotope.

What is Cl-35?

600

His experiment proved atoms have a dense nucleus?

Who was RUTHERFORD?

600

Rutherford's model was the first to introduce this part of the atom.

What was the NUCLEUS?

600

-1 and 0 are respectively the charge and relative mass of this subatomic particle

What is the ELECTRON?

600

Negative ions have this name.

What is an ANION?

600

This number appears in every type of isotope notation.

What is the MASS NUMBER?

600

This version of carbon is the most abundant

What is C-12?

800

This scientist said electrons orbit in quantized energy levels.

Who was BOHR?

800

Heisenberg worked Schrodinger to create this modern theory.

What was the QUANTUM THEORY?

800
O-17 has this many protons and that many neutrons.

What are 8 PROTONS and 9 NEUTRONS?

800

The number of electrons in Mg2+

What are 10?

800

Cl-37 has this many neutrons.

What are 20?

800

Because atomic mass is the weighted average of isotopes, it is rarely this type of number

What is a WHOLE number?

1000
This scientist created a principle stating we can't know both position and momentum of an electron

Who was HEISENBERG?

1000
Arrange these scientists in order from the earliest to the most recent.

Bohr, Rutherford, Heisenberg, Dalton, Thomson.

Who was DALTON, THOMSON, RUTHERFORD, BOHR, AND HEISENBERG

1000

This location in the atom is heavy, dense. It is also where the protons and neutrons are located.

What is the NUCLEUS?

1000

Because of less electron repulsion, cations are this compared to neutral atoms.

What is SMALLER?

1000

Isotopes of the same element behave chemically alike because it has the same amount of which two subatomic particles.

What are PROTONS and ELECTRONS?

1000

Hydrogen's average mass is 1.008, which means this isotope dominates the others.

What is H-1?