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just olya [345]
3 years ago
12

Two descriptions for a sub-atomic particle are listed below: Description 1: Non-charged particle Description 2: Located inside t

he nucleus of an atom Which sub-atomic particle or particles fit these descriptions? Electrons only Neutrons only Electrons and protons Protons and neutrons
Chemistry
2 answers:
Juliette [100K]3 years ago
8 0

Answer:

Description 1: non-charged particle: Neutrons only

Description 2: Located inside the nucleus of an atom: Protons and neutrons

Explanation:

The subatomic particles of an atom are smaller than the atom, and the main are:

  • <em>Protons</em>: they are <em>positively charged</em> and are located <em>inside the nucleus</em> of an atom.
  • <em>Neutrons</em>: they are <em>neutral</em> and are also located <em>inside the nucleus</em> of an atom.
  • <em>Electrons:</em> they are <em>negatively charged</em> and they are in <em>the periphery of the nucleus</em> at unknown pathways.
Triss [41]3 years ago
6 0
Your answer should be protons,and neutrons.
: )

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Looking across period 4 of the periodic table, potassium (atomic number 19) is followed by calcium (atomic number 20), which is
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While staying in the same period, if we move from left to right across the period, the atomic radius decreases. The reason is, in a period the number of shells remain the same and the number of electrons and protons increase as we move across the period to the right. The increased electrons and protons attract each other with greater force and hence the atomic size decreases. 

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3 years ago
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Find the number of moles of water that can be formed if you have 170 mol of hydrogen gas and 80 mol of oxygen gas. Express your
Sav [38]

<u>Answer:</u> The amount of water that can be formed is 160 moles

<u>Explanation:</u>

We are given:

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Moles of oxygen gas = 80 moles

The chemical equation for the reaction of hydrogen gas and oxygen gas follows:

2H_2+O_2\rightarrow 2H_2O

By Stoichiometry of the reaction:

1 mole of oxygen gas reacts with 2 moles of hydrogen gas

So, 80 moles of oxygen gas will react with = \frac{2}{1}\times 80=160mol of hydrogen gas

As, given amount of hydrogen gas is more than the required amount. So, it is considered as an excess reagent.

Thus, oxygen gas is considered as a limiting reagent because it limits the formation of product.

By Stoichiometry of the reaction:

1 mole of oxygen gas produces 2 moles of water

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3 0
3 years ago
A precipitate forms when mixing solutions of sodium fluoride (NaF) and lead II nitrate (Pb(NO3)2). Complete and balance the net
Leya [2.2K]

Answer:

See explanation

Explanation:

The molecular equation shows all the compounds involved in the reaction.

The molecular equation is as follows;

2NaF(aq) + Pb(NO3)2(aq) -------> PbF2(s) + 2NaNO3(aq)

The complete ionic equation shows all the ions involved in the reaction

The complete ionic equation;

2Na^+(aq) + 2F^-(aq) + Pb^2+(aq) + 2NO3^-(aq) -------->PbF(s) + 2Na^+(aq) +2NO3^-(aq)

The net Ionic equation shows the ions that actually participated in the reaction

The net ionic equation is;

2F^-(aq) + Pb^2+(aq)--------> PbF(s)

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