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
Irina-Kira [14]
3 years ago
9

Diffrence btwn a period and a group

Chemistry
1 answer:
Tpy6a [65]3 years ago
8 0
Rows of elements are called periods. The period number<span> of an element signifies the highest unexcited energy level for an electron in that element.

</span>Columns of elements help define element groups<span>. </span>Elements within a group share<span> several common properties. Groups are elements have the same outer electron arrangement.</span>
You might be interested in
What is the total E associated with one mole of photons (a unit known as the Einstein) of 3.91x1019 Hz?
sashaice [31]

Answer:

        E=1.56\times 10^{10}J

Explanation:

The<em> energy of a photon</em>, E, can be calculated with the Planck-Einstein equation:

          E=hf

Where:

  • h is Planck's constant 6.626×10⁻³⁴ J.s, and
  • f is the frequency of the photon or electromagnetic radiation.

Substituting with your data:

          E=6.626\times 10^{-34}J.s\times 3.91\times 10^{19}s^{-1}=2.5908\times 10^{-14}J

Now multiply by Avogadro's number to obtain the energy of one mole of photons:

          E=2.5908\times 10^{-14}J\times 6.022\times 10^{23}=1.56\times 10^{10}J

8 0
3 years ago
What is the mass of a 1.69-l sample of a liquid that has a density of 0.921g/ml?
Molodets [167]

The mass is 1610 g.

Explanation:

<span>D=<span>MV</span></span>, where D is density, M is mass, V is volume

Known/Given
D=0.921 g/mL
<span>V=1.75 L×<span><span>1000mL</span><span>1L</span></span>=1750 mL</span>

Unknown
M

Equation
<span>D=<span>MV</span></span>

Solution
Rearrange the equation to isolate the mass and solve for mass.

<span>M=D×V=0.921g/mL×1750mL=1611.75 g=1610 g</span> with three significant figures.

The following diagram helps to understand how to manipulate the density equation so solve for any of the variables.

The following Density Triangle will help you determine how to solve for any missing variable. Put your finger over the missing variable to see what you need to do to solve for it. For example, if you need to find volume, put your finger over the V, and you get <span>M÷D</span>.

https://www.teacherspayteachers.com/Product/Science-Journal-Density-Triangle-Foldable-Completed-4360...


3 0
4 years ago
ANSWER ASAP GIVING BRAINIEST FIVE STARS AND HEART!
tino4ka555 [31]

I can describe one prop. of energy: it can not be created or destroyed. It can be transferred, or converted, though.

5 0
3 years ago
Read 2 more answers
An alkali metal with fewer than 10 protons in its nucleus answer
otez555 [7]
The answer is beryllium
5 0
4 years ago
Read 2 more answers
What is the hybridization of the nitrogen atoms in n2?
Verizon [17]
 The hybridization of the nitrogen atoms in n2 is <span>N2 sp(3 bonds) n N2H4 sp3(1 N-N bond) 

The molecule that has a stronger N-N bond
N2 has stronger bond(multiple bonds) n in N2 two pi are stronger than 1 sigma(MOT) 
Note: in N don't forget lone pair of electrones</span>
6 0
3 years ago
Other questions:
  • Pay if forward movie questions worksheet
    14·1 answer
  • What process uses atomic particles and uranium to determine exact age ?
    5·2 answers
  • Which chemical equation demonstrates the law of conservation of mass!
    6·1 answer
  • 41. The correct name for MgF2 is _
    12·1 answer
  • A burette was improperly read to 1 decimal place giving a reading of 21.7 mL. If the actual volume is 21.86 mL, what is the perc
    15·1 answer
  • A student wants to know how many grams of water are made from 5.00g of oxygen gas. Which step goes in the spot with the
    6·1 answer
  • PLEASEEEE HELPPPPP!!!
    9·1 answer
  • PLEASE HELP!! PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE
    13·2 answers
  • Which statement is true of any chemical reaction
    6·1 answer
  • What Group is this element in? (Urgent plz help)
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!