Science Influencers
The smallest piece of matter was named "atom" by...
Who is Democritus?
The word atom comes from the greek word meaning atomos, what does this mean...
What is indivisible?
It has a neutral charge...
What is a neutron?
The nucleus of an atom contains ...
What are protons and neutrons?
If an isotope of sulfur has 16 protons, 17 neutrons, and 16 electrons, its mass number is ...
What is 33 amu?
The electron was discovered by ...
Who is J.J. Thomson?
Atoms of the same element may differ in the number of neutrons ...
What are isotopes?
The mass of an atom is found in the ...
What is the nucleus?
The atomic number of an element indicates the ...
What is the number of protons?
On the periodic table, the number written below the symbol is the ...
What is atomic mass?
As a result of this experiment, Rutherford proposed that an atom has a dense positively charged nucleus...
What is the gold foil experiment?
Elements with the same vertical column ...
What is have similar but not identical chemical properties?
The subatomic particle that moves around the outside of the nucleus is ...
What is an electron?
The atomic number of magnesium is 12. Its nucleus must have...
What is 12 protons?
A certain atom has 25 protons, 25 electrons, and 28 neutrons. It's mas number is ...
What is 53?
Electrons in orbits around the nucleus...
Who is Bohr's atomic model?
Or Russian .. this man arranged the periodic table of elements in order of increasing atomic mass...
Who is Mendeleev?
If Halogens are found in the Main Group 7 than they have how many valence electrons...
What is 7?
The mass number minus the atomic number provide the number of ...
What is the number of neutrons?
How many protons does Hydrogen have?
What is 1?
The British Scientist who discovered the atomic number of elements is ...
Who is Henry Mosely?
The symbol for Lead is ...
What is Pb?
Elements that do not react with other elements except under specially controlled conditions belong to the ...
What are the noble gases?
The difference between Carbon-12 and Carbon-14...
What is C-14 has 2 more neutrons than C-12?
Gases that have a very stable electron configuration have a stable number of electrons in their outermost energy level and are called ...
What are Noble?