1 The numbers of subatomic particles present in four species W, X, Y and Z are given in the table.
Species
Number of protons
Number of
neutrons
Number of
electrons
W
19
20
18
х
19
20
19
Y
20
20
18
z
20
22
20
Which of these species are isotopic?
A W and X
B W and Y
C X and Z
D Y and Z

Select the correct answer. which statement is true about a polarized object? o a. it gains electrons and becomes negatively charged. ob. it gains protons and becomes positively charged. oc. the number of positive and negative charges can be the same. od. it has to be a metal. o e. there is no change in the distribution of the charge in the object. reset next what

__can be defined as which velocity changes

What is the volume occupied by 10.0 dm3 of gas at standard pressure after it has been compressedat constant temputure to 500.0 kpa?