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Ksivusya [100]
3 years ago
11

Why did the model of the atom change?

Chemistry
1 answer:
choli [55]3 years ago
8 0
D. Experiments provided new evidence about the atom, I think, sorry if I’m wrong
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1) Describe the characteristics of molecular compounds that affect their particular physical
Nitella [24]

The types of intermolecular forces that occur in a substance will affect its physical properties, such as its phase, melting point and boiling point.
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3 years ago
DNA is packaged into these<br> compact units
Wittaler [7]

Explanation:

Chromosomal DNA is packaged inside microscopic nuclei with the help of histones. These are positively-charged proteins that strongly adhere to negatively-charged DNA and form complexes called nucleosomes. Each nuclesome is composed of DNA wound 1.65 times around eight histone proteins.

4 0
3 years ago
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Perform the following mathematical operations and express the correct answer to the proper number of significant figures or deci
nordsb [41]

Answer: 7.71 + 4.31 + 1.7 + 4.00141= 17.72141

7.71 x 4.31 x 1.7 x 4.00141=  226.04433255

Explanation:

(i) 7.71 + 4.31 + 1.7 + 4.00141

= 7.71000+4.31000+1.70000+ 4.00141   [make like decimals]

= 17.72141    [By adding the corresponding places ]

(ii)  7.71 x 4.31 x 1.7 x 4.00141 =( 7.71 x 4.31) x 1.7 x 4.00141

= 33.2301 x 1.7 x 4.00141

= (33.2301 x 1.7) x 4.00141

=  56.49117 x 4.00141

= ( 56.49117 x 4.00141 )

=  226.04433255

Hence,  7.71 + 4.31 + 1.7 + 4.00141= 17.72141

7.71 x 4.31 x 1.7 x 4.00141=  226.04433255

7 0
3 years ago
Acid rain is precipitation that has become acidic over time. It is caused by pollution from human activities. Acid rain is harmf
Phantasy [73]

Answer:

answer A makes the most sense

Explanation:

it's the only one the describes measuring the acid in the air from a factory (humans) I may be wrong tho

6 0
3 years ago
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Over a period of 30 days a student studied the night sky and recorded his observations. One night he watched a shooting star str
Temka [501]

Answer:

meteor

Explanation:

The most logical identification of a "shooting star" is a meteor. A meteor is basically any material from outerspace that falls to Earth. The main characteristic of a meteor is that from our point of view on the surface of the Earth it looks like a shooting star because we see a streak of light behind it. This light is simply dust and rock from the meteor burning up as it enters the Earth's atmosphere, leaving a "tail" of light behind it. Which to us looks like a shooting star.

8 0
3 years ago
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