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Dvinal [7]
3 years ago
5

Atomic Radius________across (left to right) a period and______down a group.

Chemistry
2 answers:
Lorico [155]3 years ago
7 0

Answer: Decreases across the period and increases down the group

Sonja [21]3 years ago
4 0
I’m pretty sure it’s Atomic Radius decrease across a period and increase down a group.
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Valency of Chlorine is 1. Why?​
yanalaym [24]

Answer:

Valency of Chlorine is 1 because it needs 1 electron to complete its octet (a shell of eight electrons). Valency is defined as "The combining power of an element" and Since, chlorine needs 1 electron to complete its valence shell, Its valency is 1.

8 0
3 years ago
What periodic table element has Atomic Number Z of 79 and neutron of 118?
malfutka [58]

Answer:

gold(AU)

Explanation:

hope this helps

3 0
3 years ago
Read 2 more answers
What is the volume at stp of 720.0 ml of a gas collected at 20.0 °c and 3.00 atm pressure?
MArishka [77]
Combined gas law is 
       PV/T = K (constant)

P = Pressure
V = Volume
T = Temperature in Kelvin

For two situations, the combined gas law can be applied as,
     P₁V₁ / T₁ = P₂V₂ / T₂

P₁ = 3.00 atm                                     P₂ = standard pressure = 1 atm
V₁ = 720.0 mL                                    T₂ = standard temperature = 273 K
T₁ = (273 + 20) K = 293 K
  
By substituting,
 3.00 atm x 720.0 mL / 293 K = 1 atm x V₂ / 273 K
                                          V₂ = 2012.6 mL

hence the volume of gas at stp is 2012.6 mL
5 0
3 years ago
Can anybody help??
kvv77 [185]

The amount of heat energy added to silver to heat it from 25°C to 100°C is :

8737.5 J

<u>Given data: </u>

mass of silver ( m ) = 500 g

T1 = 25°C

T2 = 100°C

s ( specific heat of silver ) = 0.233 J/g.c

<h3 /><h3>Determine the amount of heat required </h3>

Applying the formula below for heat ( Q )

Q = ms * ΔT

   = 500 * 0.233 * ( 100 - 25 )

   = 8737.5 J

Hence we can conclude that the The amount of heat energy added to silver to heat it from 25°C to 100°C is :  8737.5 J.

Learn more about heat energy : brainly.com/question/13439286

5 0
3 years ago
7 Which of the following functional groups is present in an organic compound which gives bubbles on treatment with a saturated s
Damm [24]

Answer:

A. Carboxyl group

Explanation:

The carboxyl group is an organic functional group in chemistry that consists of a carbon atom double-bonded to an oxygen atom and singly linked to a hydroxyl group. Another way to think about it is as a carbonyl group (C=O) with an attached hydroxyl group (O-H).

6 0
3 years ago
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