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Atoms
Vocab Words
Elements
More Questions
Theorists
100

The center of an Atom is called the what? 

What is the nucleus 

100

Neutron is _______ charged

What is : uncharged/ neutral

100

An atom that contains 17 protons. 

What is Chlorine?

100

what two particles make up an atom's nucleus?

What is : protons and neutrons

100

The Scientist who discovered the nucleus was positively charged, and most of the atom was empty space. 

Who is Rutherford?

200
The positively charged particle
What is : A proton
200

electrons, protons and neutrons have what charge, and where are they found

What is : negatively, positive and neutral electrons are found in orbital, protons and neutrons found in nucleus.   

200

The number of neutrons in an atom of Lithium. 

What is four?

200

How does the mass of an electron compare to the mass of protons and neutrons?

What is : It is much smaller

200

The particle discovered by J.J Thomson. 

What is the electron?
300

What is matter

anything that has weight and occupy space

300

The sum of protons and neutrons is called

What is : Mass Number or Atomic Mass

300
A magnesium atom has lost TWO electrons. This is the total number of electrons in a magnesium ion. 

What is 10?

300

The atomic mass is _______ + ________? 

number of protons + number of neutrons

300

The term atomos, coined by greek philosopher Demociritus. 

What is indivisible?

400
In an atom, which has the least mass? A: nucleus B: proton C: neutron D: electron
What is : electron
400

smallest piece of matter that still has the properties of an element. 

What is : an atom

400

What is: the atomic number, number of protons, and number of electrons of Mg on the periodic table.

12, 12, 12

400

An atom with a different number of neutrons, and therefore a different mass number. 

What is an isotope?

400
The model of the atom today, the quantum model was developed by this scientist. 

Who is Schrodinger?

500
Describe the difference between atomic number and mass number *Multiple sentence answer*
What is : The atomic number is the number of proton in an atom. The Mass number is the sum of the number of protons and neutrons in an atom of a particular isotope
500

An atom that has gained or lost electrons. 

What is an ion?
500

Two isotopes of Carbon exist. Carbon 12 and Carbon 14. Which is most abundant? 

Carbon-12.

500

How many electrons are on the 2nd valence shell? 

What is 8

500

The model used to draw atomic models today, although it is not the most accurate. 

Who is Bohr?