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1 year ago

!!!!100 POINTS!!!!

Chemistry

1 answer:

Cerrena [4.2K]1 year ago

6 0

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.

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Henry Moseley organized the periodic table by A. atomic weight. B. atomic number. C. electronegativity. D. overall charge of ato

Leni [432]

B - Atomic number. Dmitri Mendeleev organised the table according to atomic weight, however this caused problems with elements such as iodine and tellurium, Iodine has a higher mass, but a lower atomic number. And to make iodine in the same group as similar elements (halogens), Mendeleev had to break his own rules and put it before tellurium in the table. Moseley fixed this problem by ordering the elements according to atomic (proton) number.

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3 years ago

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2 years ago

The law of constant composition states: All atoms of a given element have a constant composition and are different than atoms of

Airida [17]

Answer:

Explanation:

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2 years ago

Which of these statements are true? Select all that apply.

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2 years ago

Suppose we want to charge a flask with 1.6 g of sugar. We put the empty flask on a balance and it is determined to weigh 330 g.

RSB [31]

Answer:

total weight to expect = 331.60 grams

Explanation:

The flask wanted to be charged with 1.6 grams of sugar. The empty flask was weighed on a balance and it was determined to weigh 330 grams . The weight we would expect when we add the sugar can be computed as follows:

weight of the empty flask = 330 grams

weight of the sugar = 1.6 grams

The weight of the flask after adding the sugar will be the sum of the weight of the sugar and the empty falsk

Therefore,

Total weight to expect = 330 grams + 1.6 grams

total weight to expect = 331.60 grams

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2 years ago

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