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
Anna007 [38]
3 years ago
15

There is a "short-cut" to determining the number of valence electrons. how can you determine the number of valence electrons by

just looking at the periodic table?
Chemistry
1 answer:
Illusion [34]3 years ago
4 0
The number of valence electrons of elements in a group is the same as the group number
You might be interested in
The largest mass of silver chloride precipitated is when excess silver ions are added to
Masja [62]

The largest mass silver chloride is precipitated when excess silver ions are added to 30.0cm3 of 0.30M iron(III) chloride solution.

<h3>What is a precipitation reaction?</h3>

A precipitation reaction is a reaction in which an insoluble substance is obtained when two solutions are mixed together as a result of one of the products of the reaction being insoluble in water.

Silver chloride is an insoluble salt that will precipitate when a single silver salt is added to a soluble chloride salt.

In the above, the largest mass silver chloride is precipitated when excess silver ions are added to 30.0cm3 of 0.30M iron(III) chloride solution since iron (iii) chloride is a weak electrolyte.

Learn more about precipitation reaction at: brainly.com/question/7035326

4 0
2 years ago
Can you explain the difference between molarity, percent by mass, and molality?
cestrela7 [59]
Http://chemistry.about.com/od/chemistryterminology/a/What-Is-The-Difference-Between-Molarity-And-Mol... 

3 0
3 years ago
The work function of an element is the energy required to remove an electron from the surface of the solid. The work function fo
uranmaximum [27]

Answer:

λ = 2.38 × 10^(-7) m

Explanation:

We are given the work function for palladium as 503.7 kJ/mol.

Now let's convert this to KJ/electron.

We know from avogadro's number that;

1 mole of electron = 6.022 × 10^(23) electrons

Thus,

503.7 kJ/mol = 503.7 × 1/(6.022 × 10^(23)) = 8.364 × 10^(-22) KJ/electron = 8.364 × 10^(-19) J/electron

Formula for energy of a photon is;

E = hv

Where;

h is Planck's constant = 6.626 × 10^(-34) J.s

v is velocity

Now, v = c/λ

Where;

c is speed of light = 3 × 10^(8) m/s

λ is wavelength of light.

Thus;

E = hc/λ

Making λ the subject, we have;

λ = hc/E

λ = (6.626 × 10^(-34) × 3 × 10^(8))/(8.364 × 10^(-19))

λ = 2.38 × 10^(-7) m

4 0
2 years ago
How many protons, neutrons, and electrons are present in an atom of zinc, Zn, with a mass
postnew [5]
Location the element zinc (Zn) on the periodic table:
Group number : 12
Period number : 4
Block : d block
Element : Transition elements.
Part 2:
Protons in an atom of Zn: 30
Part 3:
Electrons in a Zn atom: 30
Part 4 :
Neutron in an atom of Zn: 35
5 0
3 years ago
Ions of an element (elements with different charges) contain different numbers of what
Vadim26 [7]

Answer:

an ion is an element that has different numbers of protons and electrons

Explanation:

An ion is positive when it has more protons than electrons and negative when it has more electrons than ions.

(Hope this was helpful!) :)

7 0
2 years ago
Other questions:
  • Enter the expression 14/7N+α, where α is the lowercase Greek letter alpha. Express your answer as a chemical expression.
    12·2 answers
  • What is charge on the cation SnCl4
    8·2 answers
  • Convert 0.0052 meters to millimeters. 0.52 millimeters 0.0000052 millimeters 5.2 millimeters 52 millimeters
    12·2 answers
  • PLS HELP!!!!! A 5 kg object is accelerating at 3 m/s² while being pulled. What is the magnitude of the force causing this accele
    11·1 answer
  • 18.07 Lab Acid Neutralization 1
    15·1 answer
  • What is the relationship between atomic size and bond length for H2O / H2S and CO2 / CS2?
    13·1 answer
  • Helpppppppppppppppppp​
    10·2 answers
  • Transform boundaries occur where two plates – a slide past each other. b slide apart from each other. c slide towards each other
    10·1 answer
  • Water is the only substance that can dissolve polar solutes. True or False?
    11·1 answer
  • What orbital does the quantum numbers n=4 l=2 ml=2 describe
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!