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Georgia [21]
3 years ago
7

The Greeks were the first to use the term _____. atom electron neutron proton

Chemistry
2 answers:
kotegsom [21]3 years ago
6 0
I think the correct answer from the choices listed above is the first option. The Greeks were the first to use the term atom. In 450 BCE, Democritus coined the term átomos which means "uncuttable" or "the smallest indivisible particle of matter". 
kotegsom [21]3 years ago
3 0

Answer:

Atom

Explanation:

The Greeks first used the word "atomos" or atom.

There was a philosopher by the name of Leucippus of Miletus, and he had the idea that if you cut an object in half, and then in half again, and in half again, and so on... eventually you would get to a particle that cannot be cut in half (they were talking about the atom, however we now know that splitting an atom releases large amounts of radiation). The word atomos in Greek means "uncuttable".

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Which source is most likely to be impartial?
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A piece of glass is immersed in a liquid. It proceeds to float on the liquid's surface. This shows that the density of the glass
tamaranim1 [39]

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Explanation:

Differences in density is one reason objects float or sink.

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7 0
3 years ago
What is △n for the following equation in relating Kc to Kp?
Nimfa-mama [501]

Answer:

-1  

Explanation:

The relation between Kp and Kc is given below:

K_p= K_c\times (RT)^{\Delta n}

Where,  

Kp is the pressure equilibrium constant

Kc is the molar equilibrium constant

R is gas constant , 0.082057 L atm.mol⁻¹K⁻¹

T is the temperature in Kelvins

Δn = (No. of moles of gaseous products)-(No. of moles of gaseous reactants)

For the first equilibrium reaction:

2Na_{(s)}+2H_2O_{(l)}\rightleftharpoons 2NaOH_{(aq)}+2H_2_{(g)}

<u>Δn = (No. of moles of gaseous products)-(No. of moles of gaseous reactants)  = (2+1)-(2+2) = -1  </u>

<u></u>

7 0
4 years ago
In your own words, define:
vodomira [7]

Hey there!

1.)

The law of conservation of mass states that matter cannot be created or destroyed. This means in a chemical reaction, the products must be equal to the reactants.

2.)

In a balanced chemical equation, there are the same amount of each type of atom, or element, on each side. The products must be equal to the reactants to follow the law of conservation of mass.

3.)

When a chemical reaction occurs, we can see evidence such as bubbles, odor, color change, and heat/light being released. These all are signs that a new substance is being formed.

Hope this helps!  

8 0
3 years ago
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