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bekas [8.4K]
3 years ago
15

Complete the table to summarize the properties of the different subatomic particles. Type in your answers.

Chemistry
2 answers:
mafiozo [28]3 years ago
7 0

Answer : There are basically three subatomic particles that exists; namely proton, neutron and electron.

Please refer the attached chart for the complete comparison.

  • Protons are observed to be found in the nucleus of the atom. Which appears at the tiny, dense region at the center of the atom. They have a positive electrical charge of one  (+1)  and a mass of 1 atomic mass unit  (amu).
  • Neutrons exists in atoms of all elements they have neutrons located in their nucleus. Unlike protons and electrons, which are electrically charged, neutrons do not have any charge they are found to be electrically neutral.  The mass of a neutron is slightly greater than the mass of a proton, which is 1 atomic mass unit  (amu) .
  • Electron are fundamental particles which does not consist of smaller particles. They are a type of fundamental particles called leptons. All leptons have an electric charge of  −1  or  0 . Electrons are observed to be extremely small. The mass of an electron is only about 1/2000 the mass of a proton or neutron, so electrons contribute virtually nothing to the total mass of an atom. Electrons have an electric charge of  −1 , which is equal but opposite to the charge of a proton, which is  +1 . All atoms have the same number of electrons as protons, so the positive and negative charges "cancel out", making atoms electrically neutral.

OverLord2011 [107]3 years ago
7 0

correct answer are A: 1 B: 1 C: 0.0006

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If atom X has an atomic mass of 12, and atom Y has an atomic mass of 1, what would be the mass of 4.18 moles of the compound X7Y
natka813 [3]

Answer:

397 g

Explanation:

From the information given in the question ,

the atomic mass of X = 12 ,

and , the atomic mass of Y = 1 .

For the molecular formula , X₇Y₁₁ , the molecular mass is given as -

X₇Y₁₁ = 7 * atomic mass of X  +  11 *  atomic mass of Y

         = 7 * 12 + 11 * 1

         = 84 + 11  = 95 g / mol

Hence , molecular mass of X₇Y₁₁ = 95 g / mol .

Moles is denoted by given mass divided by the molecular mass ,

Hence ,

n = w / m

n = moles ,

w = given mass ,

m = molecular mass .

From question ,

moles n = 4.18 mol

and ,

m = molecular mass of X₇Y₁₁ = 95 g / mol .

To find the mass of the compound X₇Y₁₁   , the above formula can be used , and putting the respective values ,

n = w / m  

4.18 = w / 95

w = 4.18 * 95 = 397 g

3 0
4 years ago
Please help I will reward brainliest
scoundrel [369]
Electrons are one of three main types of particles that make up atoms. The other two types are protons and neutrons. Unlike protons and neutrons, which consist of smaller, simpler particles, electrons are fundamental particles that do not consist of smaller particles. They are a type of fundamental particles called leptons. All leptons have an electric charge of −1−1 or 00. Electrons are extremely small. The mass of an electron is only about 1/2000 the mass of a proton or neutron, so electrons contribute virtually nothing to the total mass of an atom. Electrons have an electric charge of −1−1, which is equal but opposite to the charge of a proton, which is +1+1. All atoms have the same number of electrons as protons, so the positive and negative charges "cancel out", making atoms electrically neutral.

Unlike protons and neutrons, which are located inside the nucleus at the center of the atom, electrons are found outside the nucleus. Because opposite electric charges attract each other, negative electrons are attracted to the positive nucleus. This force of attraction keeps electrons constantly moving through the otherwise empty space around the nucleus. The figure below is a common way to represent the structure of an atom. It shows the electron as a particle orbiting the nucleus, similar to the way that planets orbit the sun. This is however, an incorrect perspective, as electrons are more complicated as quantum mechanics demonstrate.

5 0
4 years ago
Read 2 more answers
Consider the redox reaction below talking place in certain electro chemical cell: Cu(s)+cu^2+(aq) -------> Cu^2+(aq) + Cu (s)
Mkey [24]

Answer:

cu+2 ------ oxidation whereas Cu ------ reduction.

Explanation:

In the reaction, cu+2 is the place where oxidation occurs because this cupric ion losses electrons  which causes +2 charge on it. we know that oxidation is the loss of electrons and reduction is the gaining of electrons so the Cu is the place or atom at which reduction occurs. Electrochemical cells have two electrodes, which is anode and the cathode. The anode is the electrode where oxidation occurs whereas the cathode is the electrode where reduction takes place.

7 0
3 years ago
The only metal that exists as a liquid at room temperature is
babymother [125]

Answer:

Mercury

Explanation:

This is the only metal that exists as a liquid at room temperature

5 0
3 years ago
Please I really really need help!!!!
Zigmanuir [339]

Answer:

1) It is the number of particles in one mole of substance. It is an arbitrary definition to denote an amount of substance, not by its weight but by its number of molecules. Why? because that is convenient when doing certain calculations involving molecule formulas.

2) 1 mole of substance contains exactly as many particles as there are atoms  in 12 grams of carbon-12.

3) The unified atomic mass unit is 1/12 of the mass of 1 carbon-12 atom.

So you see all three concepts are linked together.

4 0
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