How does one determine the number of core electrons an atom has?A.Subtract the group number from the atomic number.B.Add the group number and the period number.C.Subtract the atomic number from the atomic mass.D.Add the atomic number and the number of valence electrons.

How is the atomic mass of an element determined?By adding the number of protons and electronsBy the number of protons in the nucleusBy the number of electrons in the outer orbitalsBy adding the number of protons and neutrons in the nucleus

What does the period number tell about the energy levels occupied by electrons in an atom?A.The period number tells how many electrons are in the highest energy level of the atom.B.The period number tells how many energy sublevels are occupied in the atom.C.The period number tells which is the highest energy level occupied by the electrons.D.The period number tells how many electrons are in each sublevel of the atom.SUBMITarrow_backPREVIOUS

Which of the following phrases describes core electrons?A.Electrons that determine an atom's propertiesB.Electrons that are farthest from the nucleusC.Electrons that are closest to the nucleusD.Electrons that are involved in chemical reactions

An atom's atomic number is determined by the number of(1 Point)protons in its nucleusnucleons in its nucleuselectrons in its nucleusneutrons in its nucleus

The atomic number of an atom is the number of:Protons plus electronsNeutronsProtonsProtons plus neutrons3The relative atomic mass of an atom is the number of:Protons plus electronsProtons plus neutronsProtonsNeutrons4Referring to the periodic table, calculate how many neutrons are found in sodium (Na):23011125An atom has 12 electrons. Use the periodic table to identify the chemical symbol for this atom:CMgKO