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Atoms
Isotopes
Ions
Old History Guys
Radiation
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100
Name the three subatomic particles within an atom
Proton Neutron Electron
100
If an atom has 12 protons and 15 neutrons, what is its isotope name?
Magnesium - 27
100

What causes an Ion to form and charge?

Change in the number of electrons

100

He proposed the first atomic theory in the early 19th century, suggesting that atoms were indivisible and indestructible.

John Dalton

100

This type of radiation emits 2 protons and 2 neutrons. (i.e. helium nucleus) 

Alpha radiation

100

What is the smallest unit of an element that retains the properties of that element?

An atom.

200
Where are protons located?
The nucleus
200
If an element has 20 protons, 20 electrons, and 20 neutrons, What is its ATOMIC NUMBER?
20 Atomic Number = Number of Protons
200

What would the charge of an atom be if it had 52 electrons and 56 protons?

A charge of +4

200

This scientist discovered the electron using the cathode ray tube experiment.

JJ Thomson

200

This type of radiation converts a neutron into a proton and an electron.

beta decay

200

Which subatomic particle carries a negative charge?

An electron

300

Where are electrons located?

Electron Cloud

300
An atoms Mass Number is 30.... Keeping in mind that the atomic number is 17, what can you tell about the atom? ((Hint: How do you find the number of neutrons?))
It has 13 neutrons.. mass number - atomic number = neutrons 30 - 17= 13
300

What would the charge of an atom of Magnesium with 10 electrons be?

Charge would be +2

300

What was the major finding of the Rutherford gold foil experiment?

The discovery of a hard, positive center.

300

In beta decay what particle is ejected forming the radiation?

A high energy electron.

300

Write the isotope notation of Rhodium with a mass number of 104 and 44 electrons.

10445Rh1+

400

What determines the atomic number in an atom?

The number of protons.

400
Neutral atoms always have an equal number of what two subatomic particles?
protons and electrons
400

A neutral Sodium atom loses an electron and forms an ion.  Write the element symbol and its charge.

Na+

400

What model of the atom did Neils Bohr propose? (i.e. what were the electrons doing)

He proposed the planetary model with circular orbits.

400

This type of radiation does not change the mass number of the atomic number.

Gamma radiation.

400

What does the number of protons minus electrons represent?

The total charge of an atom.

500
Protons + Neutrons = ____________
Protons + Neutrons = the mass number of an atom
500
Which about isotopes is true? a. they have the same number of neutrons b. they have a different atomic number c. they have the same number of protons
C. They have the same number of protons
500

When a neutral atom gains an electron, it forms this type of ion.

Anion

500

What discovery did Schrodinger make to improve our model of the atom.

He proposed the electron cloud model of the atom.

500

Cesium-137 decays by emitting a beta particle. What are the resulting products

13755Cs→13756Ba+e−

500

What is it called when atoms try to stabilize and spontaneously eject subatomic particles or energy?

Radioactive Decay

750

Protons and neutrons have a mass of 1 AMU. How many grams does 1 AMU have a mass of?

1.674x10-24 grams

750

How would you name an atom that has 72 protons and 106 neutrons.

Hafnium-178

750

How do ions help stabilize the atomic structure?

They fill the outer orbitals of electrons.

750

Who discovered the neutron in the nucleus of the atom?

James Chadwick in 1932

750

Write the alpha decay equation for Uranium-238.

The resulting atom will undergo gamma radiation simultaneously and should be shown as well.

23892U→ 23490Th + 42He2+

23490Th→ 23490Th + 00γ

750
What does the Aufbau principle state about electrons?

They will occupy the lowest energy orbitals first (those close to the nucleus)