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1 year ago

Experimental evidence indicates that the nucleus of an atom

Chemistry

1 answer:

nordsb [41]1 year ago

7 0

The nucleus of an atom is positively charged and contains most of the mass if the atom.

An atom is the smallest particle of a an element that can take part in a chemical reaction.

Atoms are made up of other smaller sub-particles which are:

neutrons which are neutral
protons which are positively charged
electrons which are negatively charged

The protons and neutrons are found in the nucleus of an atom

The electrons are found regions around the nucleus.

Due to the positive charge of the protons, the nucleus of an atom are positively charged and is massive.

Learn more about atoms and nucleus at: brainly.com/question/867047

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Converting 53.3g of oxygen to moles will give you???

Marat540 [252]

Answer:

3.33 mol

Explanation:

1 g of oxygen is 0.062502343837894 mol

53.3 * 0.062502343837894

3.3313749265597505 mol

8 0

2 years ago

Calculate the mass defect for the formation of phosphorus-31. The mass of a phosphorus-31 nucleus is 30.973765 amu. The masses o

Nata [24]

<u>Answer:</u> The mass defect for the formation of phosphorus-31 is 0.27399

<u>Explanation:</u>

Mass defect is defined as the difference in the mass of an isotope and its mass number.

The equation used to calculate mass defect follows:

$\Delta m=[(n_p\times m_p)+(n_n\times m_n)]-M$

where,

$n_p$ = number of protons

$m_p$ = mass of one proton

$n_n$ = number of neutrons

$m_n$ = mass of one neutron

M = mass number of element

We are given:

An isotope of phosphorus which is $_{15}^{31}\textrm{P}$

Number of protons = atomic number = 15

Number of neutrons = Mass number - atomic number = 31 - 15 = 16

Mass of proton = 1.00728 amu

Mass of neutron = 1.00866 amu

Mass number of phosphorus = 30.973765 amu

Putting values in above equation, we get:

$\Delta m=[(15\times 1.00728)+(16\times 1.00866)]-30.973765\\\\\Delta m=0.27399$

Hence, the mass defect for the formation of phosphorus-31 is 0.27399

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2 years ago

In what layer of the skin is melanin found? What does melanin do for skin cells?

dem82 [27]

Dont know the first part but melanin quantities change the dkin color

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2 years ago

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Alexxandr [17]

Answer:

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Explanation:

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2 years ago