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oksano4ka [1.4K]
3 years ago
7

3. How did organizing the periodic table by atomic number help scientists?

Chemistry
1 answer:
forsale [732]3 years ago
4 0
Scientists developed symbols and gave the elements numbers to help organize the elements by their chemical properties. The periodic table helps identify the underlying chemical and physical traits of the elements.
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Fluorite is..
denpristay [2]

Fluorite is harder than gypsum but softer than apatite. Thus, the correct option is B.

<h3>What is the hardness of any element?</h3>

The hardness of any element may be defined as the capability of a material to oppose the process of deformation and remains in actual shape precisely.  

According to the table of hardness scales by Mohs, the increasing order of given hardness of given elements is as follows:

Gypsum < Fluorite < Apatite.

Therefore, Fluorite is harder than gypsum but softer than apatite. Thus, the correct option is B.

To learn more about the Hardness of elements, refer to the link:

brainly.com/question/23721736

#SPJ1

5 0
2 years ago
Based on the information provided in the graph, we can see that as the independent variable increases,
Gnom [1K]
Well I have no clue on what your class is doing but to me, it looks like B. the dependent variable also increases

4 0
3 years ago
Read 2 more answers
A sample of a given compound contains 13.18g of carbon and 3.32g of hydrogen. What is the percent composition of the compound?
GarryVolchara [31]

The percent composition of the compound is 79.87 % of carbon and 20.12% of hydrogen

Explanation:

Given:

mass of carbon = 13.18 grams

mass of hydrogen = 3.32 grams

percent composition of compound =?

From the given data total mass of the compound is calculated

13.8 + 3.32

= 16.5 grams

The individual percentage of hydrogen and carbon will be calculated as:

percent composition  = \frac{individual mass of the element}{total mass of the compound} x 100

For carbon,

 \frac{13.18}{16.5}x 100

percent composition of carbon = 79.87 % of carbon.

for hydrogen:

\frac{3.32}{16.5}

= 20.12 % of hydrogen

In the compound given 79.87 % of carbon and 20.12% of hydrogen is present.

8 0
3 years ago
An organic reaction that increases the degreeof unsaturation is called what​
rosijanka [135]
In the analysis of the molecular formula of organic molecules, the degree of unsaturation (also known as the index of hydrogen deficiency (IHD), double bond equivalents, or unsaturation index) is a calculation that determines the total number of rings and π bonds
4 0
3 years ago
Question # 5
den301095 [7]

Answer:

4) Transport Oxygen

Explanation:

The Nervous System sends messages throughout our body, White blood cells protect our body from harmful diseases and Bacteria, Muscles support or bone structure, and red blood cells carry oxygen throughout our entire body.

Hope this helps!

6 0
3 years ago
Read 2 more answers
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