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3 years ago

Why Sodium and phosphorus are in the same period, but they have different atomic radii?

Chemistry

1 answer:

Marianna [84]3 years ago

4 0

Answer:

Because sodium is on the left side of the PT and phosporus is on the right side. And atomis radius decreases from left to right.

Explanation:

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Why do lungfish walk on land?

Kryger [21]

Answer:

The new findings support the theory that walking first arose underwater, preceding the move onto land and the development of toes and limbs adapted to land perambulation.

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2 years ago

Ichthyothereol is isolated from the leaves of Ichthyothere terminalis. It is so toxic to fish that they will jump out of the wat

Snezhnost [94]

Answer:

See the explanation

Explanation:

We have to start by analyzing the molecule. In the molecule, we have two types of isomerism. In the double bond, we can have E or Z isomerism, and additionally, we have a chiral carbon (a carbon with 4 different bonds) (See figure 1). With this in mind, we can have 4 possible isomers.(See figure 2).

a) (3S)-2-(E)-ichthyothereol

b) (3R)-2-(E)-ichthyothereol

c) (3R)-2-(E)-ichthyothereol

d) (3R)-2-(Z)-ichthyothereol

I hope it helps!

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3 years ago

If a original sample of radioactive uranium-238 had a mass of 400 grams,what is the total amount of the uranium-238 sample that

laila [671]

Since the half-life is 4.5 billion years, two half-lives would have elapsed after 9 billion years.
If you start with 400 g, half decays during the first half-life, leaving 200 g. 
During the second half-life, half of the 200 g decays, leaving 100 g.

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4 years ago

Particles can enter the air by

mrs_skeptik [129]

Answer:

Dust

Dirt

Soot

Smoke

Drops of liquid

Explanation:

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3 years ago

Which option is the most accurate description of speed?

amid [387]

C is the answer.. B and D don't have anything to do with speed

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3 years ago

Read 2 more answers