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Grace [21]
3 years ago
7

In which direction are groups on the periodic table? →, ↓, ​↘​ In which direction are periods on the periodic table?

Chemistry
2 answers:
Vlada [557]3 years ago
8 0
A is the correct answer for periods, B is correct for groups
Sophie [7]3 years ago
5 0

Answer:

For periods a. for groups b.

Explanation:

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Someone tell me the definitions of these words
zzz [600]

Answer: conductive means to take charge or be in charge

metals ar like gold iron and stuff like that

and the last but not least would be Filling something up

Explanation:

8 0
3 years ago
Which of the following elements does not form hydride by direct heating with
ozzi
I believe the answer is A.

Hope this helps! ^^
4 0
3 years ago
Read 2 more answers
A mixture of methane and air is capable of being ignited only if the mole percent of methane is between 5% and 15%. A mixture co
DaniilM [7]

Answer:

Explanation:

The air 9% mole% methane have an average molecular weight of:

9%×16,04g/mol + 91%×29g/mol = 27,8g/mol

And a flow of 700000g/h÷27,8g/mol = 25180 mol/h

In the reactor where methane solution and air are mixed:

In = Out

Air balance:

91% air×25180 mol/h + 100% air×X = 95%air×(X+25180)

Where X is the flow rate of air in mol/h = <em>20144 mol air/h</em>

<em></em>

The air in the product gas is

95%×(20144 + 25180) mol/h = 43058 mol air× 21%O₂ = 9042 mol O₂ ×32g/mol = <em>289 kg O₂</em>

43058 mol air×29g/mol <em>1249 kg air</em>

Percent of oxygen is: \frac{289kg}{1249 kg} =<em>0,231 kg O₂/ kg air</em>

<em></em>

I hope it helps!

4 0
3 years ago
Does the hydrogen molecule obey the octet rule?
Alja [10]

Explanation:

Hydrogen does not obey the octet rule. Boron does not always

obey the octet rule and in fact forms Lewis acids such as BF3 which

only has 6 electrons.

6 0
3 years ago
In which group of teh modern periodic table are there very reactive metals and very reactive non metals?​
Rufina [12.5K]

Metals :-

Group 1A - Alkali metals ( highly reactive metals)

Non-metals :-

Group 17 - Halogens ( highly reactive non-metals )

5 0
3 years ago
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