What is the electrical charge of a calcium ion that has lost an electron?

A calcium ion already is missing two electrons (in its stable configuration corresponding to the nearest noble gas's electron configuration) from its neutral state as an atom. This means that if it looses a third electron, it now has a charge of +3e. e is NOT the charge of an electron, it is the elementary charge unit.

i dont know but i think it dosent have a charge.

im guessing the west of station b

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s