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4 years ago

Identify the period and group of the element that has the electron configuration 1s22s22p63s23p3.

2 answers:

8 0

The answer is D
The electrons are found on three shells (hence period 3) and on the third shell there are (2 + 3) electrons hence group 5A. Also, the element is Phosphorous (P)

kicyunya [14]4 years ago

7 0

<span>Period 3, Group 5A or P... use your periodic table to count. When I first learned this I colored the S group the P group, D and F groups different colors. Group 1 A and Group 2 A are S. Groups 3A to 8A are P. The B's or transition metals are D And the lanthanide series and actinide series are F. Then count left to right. </span>

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Please help! Please try and give me a long answer. Thanks!

Morgarella [4.7K]

I found this for your question

5 0

3 years ago

Balance the following chemical equation.

victus00 [196]

Answer:

a) C4H6+2H2=C4H10

b) 4Na+CF4=4NaF+C

c) 2Na+2NH3=2NaNH2+H2

d) 2H202=2H2O+O2

Explanation:

Try and make sure there is the same number of reactants as products

3 0

3 years ago

why is it better to use several trials of a titration rather than one trial to determine the concentration of a solution of unkn

svlad2 [7]

Because you are never 100% precise during the work, so it's best and most accurate answer is always the average of more trials. basically the more you do, the more accurate the answer shall be

6 0

3 years ago

Using the chemical equation in the picture, if you have 1.5 grams of Fe, how many moles of Fe would you have? (Round answer to 2

gavmur [86]

0.019moles

Explanation:

Given parameters:

Mass of Fe₂O₃ = 1.5g

Unknown:

Number of moles of Fe produced = ?

Solution:

To solve this problem, we must work from the known to the unknown. The known specie here is the mass of Fe₂O₃.

First inspect the equation and balance it;

2Fe₂O₃ + 3C → 4Fe + 3CO₂

Now find the number of moles of Fe₂O₃

Number of moles of Fe₂O₃ = $\frac{mass}{molar mass}$

molar mass of Fe₂O₃ = 2(56) + 3(16) = 112 + 48 = 160g/mol

Number of moles = $\frac{1.5}{160}$ = 0.009375moles

From the equation, we see that;

2 moles of Fe₂O₃ produced 4 moles of Fe

0.009375 moles of Fe₂O₃ will produce $\frac{0.009375 x 4}{2}$ = 0.01875‬moles of Fe

To 2 decimal places;

0.019moles

learn more:

Number of moles brainly.com/question/1841136

#learnwithBrainly

7 0

3 years ago

What is the atomic number , mass number and amount of protons electrons and nuetrons for the following symbols?

gregori [183]

Lithium (Li)
Atomic Number: 3
Atomic Mass: 6.941 amu
3 protons, 3 electrons, 4 neutrons

Magnesium (Mg)
Atomic Number: 12
Atomic Mass: 24.305 amu
12 protons, 12 electrons, 12 neutrons

Oxygen (O)
Atomic Number: 8
Atomic Mass: 15.9994 amu
8 protons, 8 electrons, 8 neutrons

Hope this helps!

3 0

3 years ago