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BRAINLIESTTTT ASAP!!! :)

1. Which of the following elements has the highest atomic mass?

Helium: 2 protons and 2 neutrons
Nitrogen: 7 protons and 7 neutrons
Oxygen: 8 protons and 8 neutrons
Hydrogen: 1 proton and no neutrons

2. Which of the following statements does not describe the structure of an atom?

An atom has a small, dense center called the nucleus.
Inside the nucleus of an atom are protons and electrons.
Protons are positively charged sub-atomic particles.
Electrons are negatively charged sub-atomic particles.

Respuesta :

carla48
For question number two, it's the second statement that doesn't describe the structure of an atom.
budwilkins
1) Oxygen: 8 protons and 8 neutrons = 16 amu

2) Inside the nucleus of an atom are protons and [[electrons]].