2.1 Atom

Question 1

If elements have the same number of electrons in their outer shell, what does this mean?

Answer 1

They will react in similar ways

Question 2

How is the number of shells in an element connected to its reactivity?

Answer 2

The more shells it has, it’ll be less reactive as each shell gets further and further away from the nucleus, meaning they are less attracted to it. This means it is less reactive

Question 3

What is the relative mass of protons and neutrons?

Answer 3

1

Question 4

What is the electrons’ mass compared to protons/neutrons?

Answer 4

Mass of 2000x smaller

Question 5

Generally, what is the size of an atoms radius?

Answer 5

0.1 nanometers

Question 6

What is the size of the nucleus in comparison to the atom’s radius?

Answer 6

10,000x smaller

Question 7

What is the symbol of an element called on the periodic table?

Answer 7

Nuclear Symbol

Question 8

What is the smaller number on each element called and what does it represent?

Answer 8

Atomic number - it shows how many protons/electrons there are

Question 9

What is the bigger number on the element and what does it represent?

Answer 9

Mass number - shows the total number of neutrons and protons

Question 10

Which particle determines what element an atom is? (Neutrons, Protons, or Electrons)

Answer 10

Protons

Question 11

What do we call an atom that has a positive or negative charge?

Answer 11

An ion