What is the total number of subatomic particles in the nucleus of an atom of 209Bi?
Which of the following molecules is NOT known as a diatomic…
Which of the following molecules is NOT known as a diatomic molecule? (The 2 should be a subscript)
Match each term with its correct description
Match each term with its correct description
There are 3 isotopes of carbon which are carbon-12, carbon-1…
There are 3 isotopes of carbon which are carbon-12, carbon-13, and carbon-14. The average atomic mass is 12.01. Which isotope is most abundant?
There are 3 isotopes of hydrogen. Name one of them and one…
There are 3 isotopes of hydrogen. Name one of them and one fact about it.
What is the charge of a nucleus of an atom?
What is the charge of a nucleus of an atom?
What is another name for the representative elements?
What is another name for the representative elements?
Of the elements Pt, V, Li and Kr, which is a nonmetal?
Of the elements Pt, V, Li and Kr, which is a nonmetal?
Which of the following is true about subatomic particles?
Which of the following is true about subatomic particles?
An element has an atomic number of 76. The number of proton…
An element has an atomic number of 76. The number of protons and electrons in a neutral atom of the element are