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e-lub [12.9K]
4 years ago
15

From his experiments, J. J. Thomson concluded that cathode ray particles can move at very fast speeds. cathode ray particles can

be moved by electric current. atoms contain small positively charged particles that are called protons. atoms contain small negatively charged particles that are called electrons. Mark this and return
Chemistry
1 answer:
Semenov [28]4 years ago
4 0

Answer:atoms contain small negatively charged particles that are called electrons

Explanation:

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4 years ago
Identify the subatomic structure of an atom.
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SUBATOMIC PARTICLES

After reading this section you will be able to do the following:

<span>List the three main subatomic particles of an atom.Discuss the positions of these particles within the atom and what electric charge they carry, if any.</span>

What are atoms made of?

Now that we have talked about how atoms are combined to make other substances, let's talk about the particles that make up the atom. Particles that are smaller than the atom are called subatomic particles. The three main subatomic particles that form an atom are protons, neutrons, and electrons. The center of the atom is called the nucleus. First, let's learn a bit about protons and neutrons, and then we will talk about electrons a little later.

Protons and Neutrons

Protons and neutrons make up the nucleus of an atom. All protons are identical to each other, and all neutrons are identical to each other. Protons have a positive electrical charge, so they are often represented with the mark of a "+" sign. Neutrons have no electrical charge and are said to help hold the protons together (protons are positively charged particles and should repel each other).

If all protons are identical and all neutrons are identical, then what makes the atoms of two different elements different from each other? For example, what makes a hydrogen atom different from a helium atom? The number of protons and neutrons in the nucleus give the atoms their specific characteristics. In the graphic below you will notice that each of the three elements have different numbers of protons and neutrons. They would also like to have the same number of electrons as they have protons in order to stay electrically balanced.

4 0
3 years ago
Element “yellowium” has three naturally occurring isotopes. Below are the masses and relative abundance of each isotope. Find th
katrin [286]
To find average atomic mass, multiply each isotope's atomic mass with its relative abundance and add it all up.

15.012*0.1423 + 16.988*0.3348 + 19.177*0.5229 = 17.851 (5 s.f.)
3 0
4 years ago
Plz help me !!! I don’t get it
kolezko [41]

Answer:

Its Simple

Explanation:

1 . Acid

2.Hydronium

3. Litmus paper

4. Hydroxyl

5. Acid ....... Reactions

5 0
3 years ago
The equation for the complete combustion of methane is ch4(g) + 2o2(g) → co2(g) + 2h2o(l) to calculate the number of grams of co
Nonamiya [84]
To determine the number or amount of carbon dioxide produced from the equation, we have to note from the given chemical reaction that the ratios of the moles of the participating reactants and the resulting products will be obtained.

The first step to answering this item is to determine the number of moles of CH4 by dividing the given amount in grams by the molar mass. Molar mass of methane, CH4, is equal to 16 g/mol.

The first conversion factor is therefore is 16 g/mol. 
6 0
3 years ago
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