HC: Fall Semester Review Part 2 (2023)

Which of these determines the identity of an atom?

• proton

• neutron

• valence electron

• protons and neutrons

Gaining or losing neutrons in an atom changes its (a)   .

• isotope type
• charge
• identity. It becomes a different element

How many protons does this isotope of titanium have?

• 48
• 22
• 26
• 70

Gaining or losing protons in an atom changes its (a)   .

• identity. It becomes a different element
• charge
• isotope type

In the given notation, what does 289 represent?

• mass number

• atomic number

• number of neutrons

• number of electrons

• number of protons

How many neutrons does this isotope of titanium have?

• 48

• 22

• 26

• 70

Gaining or losing electrons in an atom changes its (a)  

• idenidentity. It becomes a different element
• charge
• isotope type

The name of this isotope of titanium is

• titanium-48

• titanium-22

• titanium-26

Iodine-129 has _ protons

Iodine-129 has _ neutrons