Chem 1 Retest

1 An atom of sodium (Na) with 12 neutrons, 12 protons, and 12 electrons has a charge of—

Which of the following trends can be observed when moving down a column in the Periodic Table?

An atom has 25 p⁺, 30 n⁰, and 25 e^-. What is the charge of the atom’s electron cloud?

Which location would an element that is an inert gas and does not conduct electricity be found?

1 Which element would you expect to have chemical properties similar to calcium (Ca)?

How many electrons would be found in the electron cloud surrounding the nucleus above?

Which of the following best describes a neutron?

Which of the following sequences of elements would all have six valence electrons?

Which pair of subatomic particles balance the charge of the atom?

What is the mass of an atom with three protons, four neutrons, and three electrons?

Based on the information provided, it can be concluded that-

Which property of the unknown element determines the other elements it reacts with?

Which element reacts like sulfur (S) but has a greater atomic mass?

Which pair of elements has the same number of valence electrons?