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andrey2020 [161]
3 years ago
13

How do atmic raii vary in group and peroid. why?​

Chemistry
1 answer:
daser333 [38]3 years ago
5 0

down the group atomic raddi increases due to increase of energy level but across the period the atomic radii decreases since electrons in the outermost energy level are pulled closer to the nucleus decreasing the size of atom across the period

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!!!!100 POINTS!!!!
Cerrena [4.2K]

The research of astronomy during the time period of 1970 - 1990 is given below:

<u>Date</u>                                                   <u>Event</u>

1. 15 June 1974               Black Brant VC sounding rocket from White Sands.

2. 14 May 1973              Launch of Skylab, the USA's first space station

3. 26 July 1971           Launch of Apollo 15

<h3>What is Astronomy?</h3>

This refers to the branch of science that deals with celestial bodies and their relation to each other.

Hence, from information about astronomy, between the time period 1970 - 1990 as it was on the 26th of December, 1974 that the Soviet space station Salyut-4 was launched.

The event I think had the greatest impact in astronomical history during this time period was the launch of Apollo 16.

Read more about astronomy here:

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6 0
2 years ago
What is an alloy?<br> Answer question 2 if you want.
Anna11 [10]

Answer:

An alloy is a combination of metals or metals combined with one or more other elements. For example, combining the metallic elements gold and copper produces red gold, gold and silver becomes white gold, and silver combined with copper produces sterling silver. Elemental iron, combined with non-

Explanation:

that's what an alloy is all the rocks including gold silver combined with copper  and sterling silver

7 0
3 years ago
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Which is another word for 10 meters in the metric system?
kotegsom [21]

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Dekameter

Explanation:

8 0
3 years ago
What are two pieces of evidence that support the Big Bang Theory?
Phantasy [73]

Answer:

it would be redshift and cosmic background radiation

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3 years ago
Given the following information: formic acid = HCOOH acetic acid = CH3COOH HCOOH is a stronger acid than CH3COOH (1) Write the n
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Answer:

Explanation:

Attach is the net ionic equation

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4 years ago
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