Question

Which list gives the correct numbers of subatomic particles for a neutral
atom of helium?
A. Four protons, four neutrons, four electrons
B. Two protons, two neutrons, four electrons
O C. Two protons two neutrons, two electrons
D. Two protons, four neutrons, six electrons

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Answer 1

Answer:

All matter, including mineral crystals, is made up of atoms, and all atoms are made up of three main particles: protons, neutrons, and electrons. As summarized in Table 2.1, protons are positively charged, neutrons are uncharged and electrons are negatively charged. The negative charge of one electron balances the positive charge of one proton. Both protons and neutrons have a mass of 1, while electrons have almost no mass.

Table 2.1 Charges and masses of the particles within atoms

Elementary Particle Charge Mass

Proton +1 1

Neutron 0 1

Electron −1 ~0

Explanation:

Answer 2

Answer:

I thought

option

d.......