1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Citrus2011 [14]
2 years ago
14

List first thirty elements with their valences​

Chemistry
1 answer:
lbvjy [14]2 years ago
5 0

Element   Atomic Number Valency

Valency of Hydrogen 1 1

Valency of Helium 2 0

Valency of Lithium 3 1

Valency of Beryllium 4 2

Valency of Boron 5 3

Valency of Carbon 6 4

Valency of Nitrogen 7 3

Valency of Oxygen 8 2

Valency of Fluorine 9 1

Valency of Neon 10 0

Valency of Sodium (Na) 11 1

Valency of Magnesium (Mg) 12 2

Valency of Aluminium 13 3

Valency of Silicon 14 4

Valency of Phosphorus 15 3

Valency of Sulphur 16 2

Valency of Chlorine 17 1

Valency of Argon 18 0

Valency of Potassium (K) 19 1

Valency of Calcium 20 2

Valency of Scandium 21 3

Valency of Titanium 22 4

Valency of Vanadium 23 5,4

Valency of Chromium 24 2

Valency of Manganese 25 7, 4, 2

Valency of Iron (Fe) 26 2, 3

Valency of Cobalt 27 3, 2

Valency of Nickel 28 2

Valency of Copper (Cu) 29 2, 1

Valency of Zinc 30 2

You might be interested in
HELP ME WITH THIS LAST QUESTION FROM PAGE 2
spayn [35]

Carbonates

OPTION A is the correct answer

7 0
2 years ago
Read 2 more answers
Balance the following oxidation-reduction reaction and indicate which atoms have undergone oxidation and reduction.
stealth61 [152]

You should research it on quizlet.

8 0
3 years ago
Iron forms rust, expressed as: Fe2O3. Using information from the Periodic Table, what is the mass of one mole of Fe2O3?
nika2105 [10]
The answer is C, 159.70g
8 0
3 years ago
Read 2 more answers
A compound is found to contain 64.80 % carbon, 13.62 % hydrogen, and 21.58 % oxygen by weight. What is the empirical formula for
insens350 [35]

Answer:

Empirical formula is C₄H₁₀O

Explanation:

Values for C, H and O are determined as centesimal composition.

64.80 g of C in 100g of compound

13.62g of H in 100 g of compound

21.58 g of O in 100 g of compound.

We convert the mass to moles:

64.80 g . 1mol/ 12g = 5.4 moles of C

13.62 g . 1 mol /1g = 13.62 moles of H

21.58 g . 1 mol/16g = 1.35 moles of O

We pick the lowest value and we divide:

5.4 moles of C / 1.35 = 4 C

13.62 moles of H / 1.35 = 10 H

1.35 moles of O / 1.35 = 1 O

Empirical formula is C₄H₁₀O, it can be the diethyl ether.

We confirm, the excersise is well done.

Molar mass = 74g/mol

74 g of compound we have (12 . 4)g of C

In 100 g of compound we may have (100 . 48) / 74 = 64.8 g

5 0
3 years ago
Distilled water will
Kruka [31]
The answer is (c) as distilled water has the same pH as normal water therefore it is not able to react with any litmus paper.
Hope this helps :).
6 0
3 years ago
Other questions:
  • What is the interval used on the y-axis of this graph?
    9·1 answer
  • How many atoms does the formula 2HgO have?
    5·1 answer
  • Which of these indicate that a chemical reaction has occurred?
    15·2 answers
  • What items could scientists use to date a layer of rock
    8·1 answer
  • If a pea plant is tall, and tallness in pea plants is dominant over shortness, what is the phenotype of the pea plant?
    8·2 answers
  • . ______________ will slow down alcohol absorption. Sleeping well Food in the large intestine Being happy and relaxed Food in th
    9·1 answer
  • There are two physical properties of minerals that both result in smooth, flat surfaces with specific angles between them. The f
    13·1 answer
  • pls help If we multiply the mass of an object and the acceleration due to gravity, we find the downward force of the object whic
    5·1 answer
  • Is volcanoes eruption rapid change or slow change​
    14·1 answer
  • My last question its easy but i dont get it lol help plz
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!