Question

atomic structure - show what you know
select all statements that are true about protons.
□ the number of protons give the atom its identity.
□ they have a mass of 1 amu.
□ they are located in the nucleus.
□ they are negatively charged.

Explanation:

1. "The number of protons give the atom its identity": The atomic number (number of protons) determines the element, so this is true.
2. "They have a mass of 1 amu": Protons have a mass approximately equal to 1 atomic mass unit (amu), so this is true.
3. "They are located in the nucleus": Protons are found in the nucleus of an atom, so this is true.
4. "They are negatively charged": Protons are positively charged; electrons are negatively charged, so this is false.

Answer:

• The number of protons give the atom its identity
• They have a mass of 1 amu
• They are located in the nucleus