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julsineya [31]
3 years ago
6

How do you figure out the number of valence electrons in an element?

Chemistry
1 answer:
maxonik [38]3 years ago
5 0
For groups 1 2 3 4 5 6 7 8/0 its quite easy
group one has only one electron in its outer shell thus the valence electron on grp 1 will be 1 and so on eg:grp 2 . 2 electrons in outer shell . then no of valence electron=2 ./for transition metals I recommend you ask your tr because he/she will be able to explain properly but idk if tge pic zbove helps but still

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NEED IT ASAP
kozerog [31]

Answer:

Hi Lovelys!!

Answer down below!!

Explanation:

Answer: Plants need water for photosynthesis in order to make food. Water is needed more for cooling, to maintain body temperature and transport nutrients.​

Reason: Plants need water for photosynthesis. Water also helps move nutrients from the soil into the plant. Too little water can cause a plant to wilt or droop. Too much water can cause a plant's roots to rot. Plants are about 80-95% water and need water for multiple reasons as they grow including for photosynthesis, for cooling, and to transport minerals and nutrients from the soil and into the plant.

Hope this helps!! =3

Have a wonderful day, evening, or night!!

3 0
3 years ago
At 500 degree C, F_2 gas is stable and does not dissociate, but at 840 degree C, some dissociation occurs: F_2 (g) 2 F(g). A fla
bazaltina [42]

Answer:

2.73 is the equilibrium constant for the dissociation of F_2 gas at 840 degree Celsius.

Explanation:

F_2(g)\rightleftharpoons 2F(g)

Initial

0.600 atm    0

Equilibrium

(0.600 atm - p)        2p

Total pressure at equilibrium = P = 0.984 atm

P= 0.600 atm - p)+2p=0.984 atm

p = 0.384 atm

Partial pressure of the F_2 gas , p_{f_2}= (0.600 atm - 0.384 atm)=0.216 atm

Partial pressure of the F gas, p_{f} = 2(0.384 atm)=0.768 atm

K_p=\frac{(p_{F})^2}{p_{F_2}}

K_p=\frac{(0.768 atm)^2}{0.216 atm}=2.73

2.73 is the equilibrium constant for the dissociation of F_2 gas at 840 degree Celsius.

7 0
4 years ago
Please help!!!!!!!!!!!!!!!!
STALIN [3.7K]
1. Dmitri created groups of 3
2. John Newlands arranged the elements
3. Antoine Lavoisier divided them into catagories
4. Johann used patterns

hope this helped :) 
3 0
3 years ago
X ÷ 3 – y ÷ 6 + z ÷ 9<br>​
sveta [45]

Answer:

1/18x(6x-3y+2z)

1/3x-1/6y+1/9z

Explanation:

3 0
3 years ago
Write the autoionization reaction for methanol, ch3oh.
aliina [53]
Autoionization Reactions are those reactions in which ions or molecules ionizes spontaneously without adding any external reagent.

For Example,
                    Autoionization of water.

                               H₂O  +  H₂O   ⇆   H₃O⁺  +  OH⁻

Autoionization reaction of Methanol is shown below,

4 0
4 years ago
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