Which statement about atoms of elements in the same group of the periodic table is true? they share the same number of electrons and the same atomic radius size. they share similar chemical properties and the same number of valence electrons. they share the same number of energy levels and the same amount of reactivity. they share the same number of protons and the same mass.

Atoms of elements in the same group of the periodic table share similar chemical properties and have the same number of valence electrons.

The atomic radius of atoms increases from top to bottom in a Group because you are adding one more electron shell at each step.

Atomic mass increases from top to bottom because there are more protons and neutrons in the nucleus.

For metals, reactivity also increases from top to bottom because the valence electrons are further from the nucleus. Other elements can attack the valence electrons more easily.

For nonmetals, reactivity increases from bottom to top in a Group because the valence electrons are closer to the nucleus, which then has a greater attraction for extra electrons.

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

question answered by

(jacemorris04)