Question

(c) a total of three shells, with four electrons in its valence shell?
(d) a total of two shells, with three electrons in its valence shell?
(e) twice as many electrons in its second shell as in its first shell?
(a) What property do all elements in the same column of the Periodic
boron have in common?
(b) What property do all elements in the same column of the Periodic
fluorine have in common?
An atom has electronic configuration 2, 8, 7.
(a) What is the atomic number of this element?
(b) To which of the following elements would it be chemically
(Atomic numbers are given in parentheses.)
N(7
F(9)
P(15)
Ar(18)
lassification of Elements​

Answer 1

Answer:

is the product of the mass and velocity of an object. ... In SI units, momentum is measured in kilogram meters per second (kg⋅m/s). Newton's second law of motion states that the rate of change of a body's momentum is equal to the net force acting on it