Free Printable Radioactivity and Atomic Structure

Worksheets

Radioactivity and Atomic Structure

Total questions: 10

Worksheet time: 23mins

Name

Class

Date

Where is the proton located?

In the very dense nucleus

Floating around in the negative electron cloud

the loose nucleus

the positive electron cloud

What is the atomic number of Neon, Ne?

20.1798

10.1798

Iron-60 (atomic number 26) is an isotope that is often used to study meteorites. How many neutrons does iron-60 have?

A neutral atom of the isotope ²⁶₁₂Mg would consist of

12 protons, 26 neutrons, 26 electrons

26 protons, 12 neutrons, 26 electrons

26 protons, 14 neutrons, 14 electrons

12 protons, 14 neutrons, 12 electrons

An isotope of an element has the same number of _________, but a different number of _________.

Protons, electrons

Protons, neutrons

Electrons, neutrons

Neutrons, protons

What makes something radioactive?

different electrons

an unstable nucleus

contaminated protons

It decays over time

Which subatomic particles contribute the most to the mass of an atom?

Protons, Neutrons, Electrons

Protons only

Protons and Electrons

Protons and Neutrons

Four isotopes of lead include lead-204, lead-206, lead-207, and lead-208. The average atomic mass of lead is 207.2. Which isotope of lead is likely to be the most abundant.

204

206

207

208

What is the mass number of this atom?

10-13.

Answer the questions below after watching the video

10.

What happens to an atom when it becomes an ion?

It gains or loses protons

It gains or loses neutrons

It gains or loses electrons

It remains unchanged

11.

How can iron form different ions?

By changing its protons

By bonding with other elements

By losing different numbers of electrons

By gaining electrons

12.

What charge does a cation carry?

Neutral

Variable

Positive

Negative

13.

What leads to the formation of anions?

Gaining protons

Losing protons

Gaining electrons

Losing electrons

Reset

Radioactivity and Atomic Structure

Total questions: 10

Worksheet time: 23mins

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