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
Vsevolod [243]
3 years ago
15

What is the valence number of an element that has 3 electron in its outermost shell?

Chemistry
1 answer:
givi [52]3 years ago
5 0
Lithium has 3 electrons --- 2 in the first shell, and 1 in the second shell (so one valence electron). Beryllim has 4 electrons --- 2 in the first shell, and 2 in the second shell (so two valence electrons). Boron has 5 electrons --- 2 in the first shell, and 3 in the second shell (so three valence electrons).Jul 27, 2019
Hope that helps and may I get brainliest?
You might be interested in
A joule is a unit of _____. A. force B. work only C. energy only D. work or energy
seropon [69]
I would personally say C. Energy only...
3 0
3 years ago
Read 2 more answers
heyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy
jeka94
The answer is Heyyy friend in know because I took the test
4 0
3 years ago
There are 0.3 moles of xenon gas in a 0.5-liter container at 30 degrees C. What is the pressure exerted by the xenon gas
Kaylis [27]
PV = nRT
P = (nRT)/V
P = (0.3 mol × 0.08206 atm-l/(mol-K) × (273.15 + 30) K)/(0.5 l)
P = 14.9258934 atm
3 0
3 years ago
Read 2 more answers
An unknown gas Q requires 2.67 times as long to effuse under the same conditions as the same amount of nitrogen gas. What is the
Misha Larkins [42]

Answer:

The correct answer is 199.66 grams per mole.

Explanation:

Based on law of effusion given by Graham, a gas rate of effusion is contrariwise proportionate to the square root of molecular mass, that is, rate of effusion of gas is inversely proportional to the square root of mass. Therefore,  

R1/R2 = √ M2/√ M1

Here rate is the rate of effusion of the gas expressed in terms of number of mole per uni time or volume, and M is the molecular mass of the gas.  

Rate Q/Rate N2 = √M of N2/ √M of Q

The molecular mass of N2 or nitrogen gas is 28 grams per mole and M of Q is molecular mass of Q and based on the question Q needs 2.67 times more to effuse in comparison to nitrogen gas, therefore, rate of Q = rate of N2/2.67

Now putting the values we get,  

rate of N2/2.67/rate of N2 = √28/ √M of Q

√M of Q = √ 28 × 2.67

M of Q = (√ 28 × 2.67)²

M of Q = 199.66 grams per mole

3 0
3 years ago
Which of the changes gas to solid gas to liquid, liquid to solid liquid to gas,solid to liquid solid to gas will involve an outp
Verdich [7]

Answer:

Liquid to solid liquid to gas

Explanation:

Boiling a liquid result in a gas

7 0
2 years ago
Other questions:
  • Which potential component in the synthetic pain relief mixture could be separated from the mixture using liquid-liquid extractio
    7·1 answer
  • A 7.73 mass % aqueous solution of ethylene glycol (HOCH2CH2OH) has a density of 1.19 g/mL. Calculate the molarity of the solutio
    12·1 answer
  • What are two things that happened as a blood passes the lungs?
    11·1 answer
  • State the mechanisms of alkene reaction
    5·1 answer
  • A plane flew for 2 hours at 467 mph
    13·1 answer
  • Which two models would be most useful in predicting weather
    13·2 answers
  • 1. Which is not a characteristic of asexual reproduction?
    5·1 answer
  • Is a burning log an exothermic or endothermic event if the log is the system?
    5·2 answers
  • What is most likely the amount of energy available at a trophic level of tertiary consumers if the amount of energy available to
    13·2 answers
  • Which statement below best describes kinetic energy?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!