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
Kay [80]
3 years ago
13

What conclusion can you make about electrons and the periodic table?

Chemistry
1 answer:
kogti [31]3 years ago
3 0

Answer:

The number of valence electrons can be known from the group that the element is in (except the lanthanides, actinides and groups 3-12).

Explanation:

Group 1 has 1 valence electron. Group 2 has 2 valence electrons. Group 13 has 3 valence electrons. Group 14 has 4, group 15 has 5, group 16 has 6, group 17 has 7, and group 18 has 8.

Group 18 are the noble gases which are stable.

Group 17 are the halogens and react well with the alkali metals.

You might be interested in
Question 5 (1 point)<br> Potassium Bromide is insoluble.<br> O True<br> O False
Delicious77 [7]
Is soluble in water but not soluble in acetonitrile.

So i think its false
4 0
3 years ago
Read 2 more answers
At what temperature <br> does water boil
Ipatiy [6.2K]
The temperature is a 100
5 0
3 years ago
Read 2 more answers
Which structure of the organism work together to carry out all of its life functins?
KiRa [710]
Each cell does not perform every life function on its own. Instead, the cells work together to carry out the life functions of the organism.
8 0
3 years ago
The standard enthalpy of formation of BrCl(g) is 14.7 kJmol-1 . The standard enthalpies for the atomization of Br2(l) and Cl2(g)
natita [175]

Explanation:

Equation of the reaction:

Br2(l) + Cl2(g) --> 2BrCl(g)

The enthalpy change for this reaction will be equal to twice the standard enthalpy change of formation for bromine monochloride, BrCl.

The standard enthalpy change of formation for a compound,

ΔH°f, is the change in enthalpy when one mole of that compound is formed from its constituent elements in their standard state at a pressure of 1 atm.

This means that the standard enthalpy change of formation will correspond to the change in enthalpy associated with this reaction

1/2Br2(g) + 1/2Cl2(g) → BrCl(g)

Here, ΔH°rxn = ΔH°f

This means that the enthalpy change for this reaction will be twice the value of ΔH°f = 2 moles BrCl

Using Hess' law,

ΔH°f = total energy of reactant - total energy of product

= (1/2 * (+112) + 1/2 * (+121)) - 14.7

= 101.8 kJ/mol

ΔH°rxn = 101.8 kJ/mol.

8 0
3 years ago
Please help me with this
Zina [86]

Answer:

C

Explanation:

it breaks down a simple sugar into a type of energy their cells can use

6 0
3 years ago
Read 2 more answers
Other questions:
  • Chao is thinking about doing a project on plate tectonics for the school science fair. Which design would best relate to how the
    9·2 answers
  • What is the mass/volume percent concentration of 2.75g of K2SO2 dissloved in 350.0 ml of solution
    9·1 answer
  • All the members of the same species living in an area is called a(n): *<br> Biosphere
    11·2 answers
  • Aluminum oxide forms when aluminum reacts with oxygen. 4Al(s) + 3O2(g) → 2Al2O3(s) A mixture of 82.49 g of aluminum (M.W.= 26.98
    5·2 answers
  • 2. Iron reacts with superheated steam to form hydrogen gas and the oxide Fe3O4. Calculate the number of moles of hydrogen produc
    15·1 answer
  • approximately how many grams of sodium chloride (NaCl) are required to prepare 500. mL of 3.00 M solution
    11·1 answer
  • A student uses 0.0821 L• atm/mol • K as the value of the gas constant. What is most likely true about the variables in the ideal
    8·1 answer
  • A girl has a weight of 450 N and her feet have a total area of 300Cm2
    15·1 answer
  • Earth is in constant motion. It rotates once every 24 hours, which causes day and night.
    13·1 answer
  • How much would the boiling point of water increase if mol of NaCl added 1 kg of water (Kb= 0.51 degrees Celsius /(mol/kg) for wa
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!