C 1.7 Ions, Atoms, Isotopes

Question 1

What changes for there to be a negative/positive ion?

Answer 1

The number of electrons. Gain electrons= negative ion
Lose electrons=positive ion
Remember electrons are negative.

Question 2

What are isotopes?

Answer 2

An atom of the same element where the number of neutrons are different

Question 3

What percentage is there of chlorine 35 mass number

Answer 3

75 percent

Question 4

What percentage is there of chlorine 37

Answer 4

25 percent that is why the periodic table says 35.5 for the mass number.

Question 5

Why are there decimals for some elements mass numbers?

Answer 5

Isotopes , the same element with different number of neutrons therefore the decimal is an average depending on the percentages that there are of the different forms (good example chorine).

Question 6

How to find an answer in nano meters?

Answer 6

X10 to the power of -9

Question 7

What is an ion?

Answer 7

A charged atom

Question 8

Where does the mass number go?

Answer 8

Above and left of the element

Question 9

Where does the atomic number go?

Answer 9

Below and left of element

Question 10

How big is am atom?

Answer 10

1/10 of a billionth of a meter across (perspective of how small they are)

Question 11

Can isotopes physical properties such as density differ?

Answer 11

Yes