2. Atoms & Elements

How many total electrons are present in a neutral atom of carbon?

In the chemical formula SiCl_4, what does the number '4' represent?

How many protons are present in a neutral atom of carbon?

The region outside the nucleus where an electron can most probably be found is the:

How many electrons are present in a neutral atom of carbon-14?

Which scientist is credited with the discovery of the atomic nucleus?

Which of the following atoms has the smallest number of neutrons?

Which of the following best describes the overall charge of an atom's nucleus?

How many electrons can the first energy level (n = 1) of an atom hold?

Which element has an atom with a nucleus containing 56 protons and 82 neutrons?

Which of the following is the number of electrons in a neutral atom of scandium (Sc)?

Which of the following correctly describes the composition of a neutral atom of helium-4?

Which number is equal to the number of protons in an atom?

Given three atom diagrams, each showing a single electron at different distances from the nucleus, which diagram represents the electron with the highest potential energy?

Gold has an atomic number of 79 and a mass number of 197. How many neutrons does a typical atom of gold contain?