more science problems lol?

Question

choose the correct word to fit into the sentence...

1. most of an atom is made up of...
empty space / electrons

2. most of the mass of an atom is due to the...
nucleus / electrons

3. all the atoms of an element are...
the same / different

4. to find out what element an atom is from, you look at the number of...
protons / neutrons


thanks if you can help =)

Answer 1

1. Empty space (the nucleus is very small and the electrons are also very small but the space between them is quite empty.

2. Nucleus (Nucleus contains protons and neutrons which are nearly 1800 times heavier than electrons)

3. Same (If the element contains isotopes, strictly speaking there will be minor differences in the mass number)

4. Protons (since the protons are balanced by electrons and the electrons determine the chemical nature of the element)

Answer 2

btw im 13 and this is what i think


1.electrons

2.electrons

3.same

4.neutrons


sorry i guessed all but 3