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Ganezh [65]
3 years ago
12

Locate the element zinc (Zn) on the periodic table. How many protons does an atom of zinc contain? How many electrons does an at

om of zinc contain? How many neutrons does an atom of zinc contain? Give your answer to the nearest whole number.
Chemistry
2 answers:
Lady bird [3.3K]3 years ago
4 0
<h2>Answer:</h2><h3>Part 1:</h3>

Location the element zinc (Zn) on the periodic table:

  •    Group number : 12
  •     Period number : 4
  •     Block :  d block
  •      Element : Transition elements.
<h3>Part 2:</h3>

Protons in an atom of Zn:  30

<h3>Part 3:</h3>

Electrons in a Zn atom: 30

<h3>Part 4 :</h3>

Neutron in an atom of Zn: 35


<h3 />
Darya [45]3 years ago
4 0

<u>Answer:</u> Number of protons and electrons in Zinc are 30 and number of neutrons in zinc are 35.

<u>Explanation:</u>

Zinc is the 30th element of the periodic table having mass number of 65.

  • Atomic number is defined as the number of protons or number of electrons present in an element. It is represented as Z.

Atomic number = Number of protons = Number of electrons

For Zinc:

Z = 30

So, Number of protons = Number of electrons = 30

  • Mass number is defined as the sum of number of protons and number of neutrons. It is represented as A.

Mass number = Number of neutrons + Number of protons

A = 65

So, Number of neutrons = 65 - 30 = 35

Hence,  number of protons and electrons in Zinc are 30 and number of neutrons in zinc are 35.

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8 0
3 years ago
I have a sample of galena. It appears there may be some gold in it. It is a piece of raw ore so I took it to a metallurgist and
Lubov Fominskaja [6]

Yes it is possible

Explanation:

Galena and gold can become encrusted together. They can form together in the same geologic setting.

  • Gold usually occurs freely in nature uncombined with other atoms.
  • Galena is the largest ore of lead.
  • Both minerals can become twinned under appropriate geologic conditions.
  • They are usually seen in pegmatitic intrusions in a rock body as product of late stage melt crystallization.

learn more:

Renewable resources brainly.com/question/4344417

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7 0
3 years ago
In a typical calorimetry experiment (similar to what you did with the combustion of cheese balls), a small bag of Skittles (10.0
kolezko [41]

This question is incomplete, the complete question is;

In a typical calorimetry experiment (similar to what you did with the combustion of cheese balls), a small bag of Skittles (10.0 g) was combusted and the temperature of the water (1.00 kg) increased by 40.0 °C.

a) How much energy (in calories and Food calories) was released by the combustion of the Skittles

b) How many small bags of skittles would a 140 lb person have to eat in order to equal the amount of food calories burned by walking a marathon?

Marathon = 26.2 miles, average person burns 0.453 food calories/mile pound)

Answer:

a)

Number of calories = 40000 Cal

Number of food calorie = 40 KCal

b)

41.54 bags of skittles are required

Explanation:

Given that;

mass of water = 1kg = 1000g

change in Temp ΔT = 40°C

specific heat of H₂O = 4.84 = 1 Cal

Now

heat absorbed by the water = MSΔT

= 1000gm × 1 cal × 40°C = 40000 Cal

so

Number of calories = 40000 Cal

(since food calories = 1000 small calories)

so

Number of food calorie = 40 KCal

Next

number of mile lb , if the man runs in the marathon will be;

26.2 × 140

= 3668 mile lb  

0.453 food calorie is burned for 1 mile pound.

So, amount of food calorie required if the man runs in the marathon will be

0.435 × 3668 mile lb

= 1661.60 food calires.

now

40KCal food calorie is released by 10gm.

So, 1661.60 cal will be released from

⇒ (10gm × 1661.60) / 40 = 415.4 gm

now

1 bag = 10gm,

therefore 415.4 gm = 41.54 bags

∴ 41.54 bags of skittles are required

6 0
3 years ago
Draw structures from the following names, and determine which compounds are optically active:(b) 3-chloro-3-methylpentane
VladimirAG [237]

The given compound 3-chloro-3-methylpentane is not optically active .

Because this compound  have plane of symmetry (POS) and center  of symmetry (COS) i.e.  have di-symmetry . And also forms  superimposable mirror image . the compound is not optically active .

It does not have chiral center.

Here the carbon atom has only 3 distinct groups i.e. ethyl , chlorine ,  methyl .

<h3>What is di-symmetry?</h3>

Di-symmetry is that which have no center of symmetry and plane of symmetry and alternate axis of symmetry .

<h3>Chiral center :</h3>

Have Sp3 hybridized center (4sigma bond ) .

4 distinct group  is attached to the chiral atom. form non -superimposable mirror image .

<h3>What is optical isomerism ?</h3>

Same molecular formula and same structural formula . also have same physical and chemical properties .

They differ in their behavior towards plane polarized light (ppl) .

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8 0
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