The atom having the valence shell configuration 3s^2 3p^3 would be:
A. Group lllA, Period 5
B. Group VA, Period 3
C. Group VllA,Period 4
D. Group IIIA, Period 3
Which symbols represent atom that are isotopes
A. C-14 and N-14
B. 0-16 and 0-18
C. Ca-40 and Ca-40
D. Na^+2 and O^-2
Which of the following correctly describes the subatomic parties in the isotope ^44Ca?
A. 20 protons, 22 electrons, 25 neutrons
B. 20 protons, 24 electrons, 25 neutrons
C. 20 protons, 24 electrons, 20 neutrons
D. 20 protons, 20 electrons, 24 neutrons
what do the following have in common?
Ne-20, F^-1, Mg^+2
A. they are isomers of each other.
B. they all have the same number of electrons
C. they are different elements so they have nothing in common
D. they are all located within the same region of the periodic table
Which of the following statements, in general, is true about the properties of elements on the periodic table?
A. elements in the same period have similar properties because they have the same number of energy levels.
B. elements get smaller as you move down the group
C. elements in the same group have similar properties because they have the same number of valence electrons.
D. elements in group 8A are the most reactive.
organize the following atoms according to increasing number of orbitals surrounding the nucleus: Rubidium (Rb) Phoshorous (P), Neo (Ne), Gallium (Ga)
A. Rb, P, Ne, Ga
B. Ga, P, Ne, Rb
C. Ne, P, Ga, Rb
D. Ne, Ga, P, Rb