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a_sh-v [17]
3 years ago
15

HELP 40 POINTS

Chemistry
2 answers:
padilas [110]3 years ago
8 0

Answer:

F2

Explanation:

F2 is the only element with only 1 element and eveything else is formed by 2 non-metals

goldfiish [28.3K]3 years ago
3 0

Answer:d I believe

Explanation:

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2 reason why noble gases become less ideal in their behaviour down the group
masha68 [24]
<span>Well, to start with, since the atomic radius of the gas increases as it goes down the period, it causes there to be a decrease in the effect that the nucleus's positive charge has on the valence electrons ( more electrons in between, and more distance ). This causes the valence electrons to become less tightly bound to the atom, which translates to a deviation from the noble gases tendencies to remain nonreactive.</span>
4 0
3 years ago
Which of the following particles has almost no mass? proton neutron electron
ahrayia [7]

<u>Answer:</u> Electron has almost no mass.

<u>Explanation:</u>

Mass is defined as the actual matter that is contained in a substance. At an atomic level, it is expressed in atomic mass units.

The given options are the 3 subatomic particles.

Mass of the given subatomic particles are:

Proton = 1.007276u

Neutron = 1.008664u

Electron = 0.0005485u

Mass of neutron is slightly more than the mass of proton.

From the above information, it is visible that electron has a negligible mass.

Hence, the correct answer is electron.

5 0
4 years ago
BRAINLIEST TO CORRECT only answer number 10 please
IRINA_888 [86]

Answer:

they are softer as you go deeper

Explanation:

because the core is liquid

5 0
2 years ago
What is the molarity of 0.8 moles of KCL in 2L of solution
vivado [14]

Answer:

The molarity is 0,4M

Explanation:

The molartity is moles of compound (in this case KCl) in 1 liter of solution :

2 L----------0,8 moles KCl

1 L-----------x= (1L x0,8 moles KCl)/2L= 0,4 moles KCl--> 0,4M

6 0
3 years ago
A helium balloon has a pressure of 0.2 kPa and a volume of 15 L. If the pressure increases to 0.5 kPa, what volume will the ball
Alex17521 [72]

Answer:

6.0 L

Explanation:

For this question, we can use

P1×V1= P2 × V2

where

P1 (initial pressure)= 0.2 kPa

V1 (initial volume)= 15L

P2 (final pressure)= 0.5 kPa

V2(final volume)= ?

Since we are trying to find final volume, we can rearrange the equation to make V2 the subject.

V2= (P1 × V1)/ P2

V2= (0.2 ×15)/0.5

V2 =6 L

7 0
3 years ago
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