Chemistry Atomic Structure and Isotopes

Isotopes and atomic structure recap

​Subatomic Particles

​Although atoms are very tiny, they consist of even smaller particles. Three main types of particles that make up all atoms are protons, neutrons, and electrons. The interactive below shows how these particles are arranged in an atom.

​The atom shown above represented by the model is carbon, but the particles of all atoms are arranged in the same way. At the center of the atom is a dense area called the nucleus, where all the protons and neutrons are clustered closely together. The electrons constantly move around the nucleus.

Multiple Choice

1. 1) What is the charge of the nucleus of an atom?

• negative

• positive

• neutral

• none

Multiple Choice

The atomic number of an element that has 9 protons, 9 electrons, and 10 neutrons is _____.

• 9
• 10
• 19
• 28

Multiple Choice

Where is most of the mass in an atom located?

• in the nucleus
• in the protons
• in the neutrons
• in the electrons

Multiple Choice

What is the atomic number of the atom pictured? 

• 9
• 10
• 18
• 19

Multiple Choice

Which of the following determines the identity of an element?

• number of protons

• atomic mass

• number of neutrons

• number of shells

Multiple Choice

What subatomic particles would you find in the nucleus of an atom?

• Protons only
• Protons and Neutrons
• Neutrons and Electrons
• Protons and Electrons 

Multiple Choice

What does the 6 represent?

• Atomic mass

• atomic number

• chemical symbol

• element name

Multiple Choice

In order for an atom to be neutral what has to be true?

• The atom has more protons than neutrons
• The atom has more neutrons than protons
• The atom has the same number of protons and neutrons
• The atom has the same number of protons and electrons

Multiple Choice

What is the mass number?

• the number of protons in the nucleus

• the number of protons and neutrons in the nucleus

• the number of neutrons in the nucleus

• the number of protons and electrons in the atom

What Are Isotopes?

​Atoms of the same element have the same number of protons, but can differ in the number of neutrons. These variations are called isotopes. Most elements have several isotopes, but only a few are stable and common. While isotopes of an element have different masses, they share the same chemical properties due to identical electron numbers.

Drag and Drop

This isotope of Titanium has:

​

Placeholder

protons

22 electrons

​

Placeholder

neutrons

mass number of ​

Placeholder

Drag these tiles and drop them in the correct blank above

22

26

48

70

47

21

Hotspot

Label the mass number:

Hotspot

Label the atomic number:

Hotspot

Label the number of protons:

Hotspot

Label the number that is protons and neutrons added together:

Fill in the Blank

Write the hyphen notation for the element that has 9 protons and 10 neutrons:

-

Fill in the Blank

Write the hyphen notation for the element that has 1 proton and 0 neutrons:

-

Dropdown

An atom of Aluminum-27 has:

​

Select answer

protons

​

Select answer

neutrons

a mass number of ​

Select answer

Match

Match the following

• number of protons & electrons

• number of neutrons

• mass number

18

22

40

• 18

• 22

• 40

Fill in the Blank

What is the mass number of an atom that has 52 protons, 52 electrons, and 76 neutrons?