Aneutral atom of sodium has 11 protons. use this information explain the total number of electrons that are in sodium

Electrons and protons have opposite electric charge. They are present in the same number, but opposite electric charge. ( since the atom is neutral )

Explanation:

if we look at the periodic table we see, for the sodium atom (Na), that the atomic number (Z) is 11. The atomic number is the number of protons. Protons are positive.

Since this sodium atom is neutral, this means that there are the same number of electrons, which are negative. So also 11 electrons.

Electrons and protons have opposite electric charge.

Following the formula A = Z + N

Here is A = atomic mass, and is the sum of protons ( same as electrons ) + neutrons

As we can see on the periodic table the atomic mass of Sodium(Na) is 23

23 = 11 + N  ⇔ N = 23 -11 = 12 neutrons

the correct answer is boyle

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance