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
Natali [406]
3 years ago
12

How do I tell the number of Valence electrons present in an element just by looking at a periodic table?

Chemistry
1 answer:
zhuklara [117]3 years ago
5 0
Look at the periodic table (Boron has 3) and count up from there
You might be interested in
A gas has an initial volume of 455 mL at 105ºC and a final volume of 235 mL. What is its final temperature in Celsius degrees?
Oksana_A [137]
Hello!

To solve this problem we're going to use the Charles' Law. This Law describes the relationship between Volume and Temperature in an ideal gas. Applying this law we have the following equation:

\frac{V1}{T1} = \frac{V2}{T2} \\  \\ T2= \frac{V2*T1}{V1}=  \frac{235 mL * 105  ^{\circ}C }{455 mL}=54,23 ^{\circ}C

So, the final temperature is 54,23 °C

Have a nice day!
5 0
4 years ago
Read 2 more answers
Is this statement true or false?
barxatty [35]
Pretty sure the answer is true
3 0
3 years ago
Read 2 more answers
How many seconds are there in two 24 hour days?
Oduvanchick [21]

Answer:

86,400 seconds in a day.

Explanation:

There are 24 hrs in a day. So there are 2460 mins in a day. ( 1hr=60 mins) So there are 246060 seconds in a day. (1 min = 60 seconds) Therefore 86,400 seconds in a day.

5 0
3 years ago
Read 2 more answers
The specific heats and densities of several materials are given below:
krek1111 [17]

<u>Answer:</u> The change in temperature is 84.7°C

<u>Explanation:</u>

To calculate the change in temperature, we use the equation:

q=mc\Delta T

where,

q = heat absorbed = 1 kCal = 1000 Cal    (Conversion factor: 1 kCal = 1000 Cal)

m = mass of steel = 100 g

c = specific heat capacity of steel = 0.118 Cal/g.°C

\Delta T = change in temperature = ?

Putting values in above equation, we get:

1000Cal=100g\times 0.118Cal/g.^oC\times \Delta T\\\\\Delta T=\frac{1000}{100\times 0.118}=84.7^oC

Hence, the change in temperature is 84.7°C

6 0
3 years ago
If I have 21,000 mL of gas at a temperature of 870C and a pressure of 101 atm, what will be the pressure of the gas if I raise t
erastovalidia [21]

Answer:

We  have,

Initial volume is V  

1

​  

 

Initial temprature is T  

1

​  

=75  

0

C

Initial pressure is P  

1

​  

 

So, final temprature is T  

2

​  

=273+75=348K

V  

2

​  

=V  

1

​  

−  

100

15

​  

V  

1

​  

 

=  

100

85V  

1

​  

 

​  

 

Applying the gas formula,

T  

1

​  

 

P  

1

​  

V  

1

​  

 

​  

=  

T  

2

​  

 

P  

2

​  

V  

2

​  

 

​  

 

348

P  

1

​  

V  

1

​  

 

​  

=  

T  

2

​  

×100

2P  

1

​  

×85V  

1

​  

 

​  

 

T  

2

​  

=  

100

2×85×348

​  

 

T  

2

​  

=591.6K

4 0
3 years ago
Other questions:
  • Which of these are measures of quantity?
    6·1 answer
  • In which of the following orbitals is the fifth valance electron
    14·1 answer
  • On the periodic table, a "period" is A. all of the elements colored orange. B. all of the elements colored green. C. a vertical
    6·2 answers
  • Aqueous calcium bromide was mixed with aqueous gold(i perchlorate, and a crystallized gold(i bromide product was formed. conside
    13·2 answers
  • How is the mass of a liquid substance affected after it boils.
    7·1 answer
  • What is the strongest intermolecular force between a​ NaCl unit and an H2O molecule together in a solution?
    11·2 answers
  • True or false the stomach is made of strong muscles that mix the food with digestive juices.
    10·2 answers
  • 1. All of the following statements are true
    15·1 answer
  • Please help!
    15·1 answer
  • HELLPPPPP 5th grade math
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!