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natali 33 [55]
3 years ago
12

A chemical element is a pure substance that consists entirely of one type of what

Chemistry
1 answer:
Alexxandr [17]3 years ago
3 0

A chemical element is a pure substance that consists entirely of one type of atom. Atoms of any element should have same number of protons but they can have different number of neutrons.  

Elements are the simplest substances that can not be broken down by using the chemical reactions these can be changed into other elements using nuclear methods.

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What is the second most abundant element in stars? A. helium B. iron C. hydrogen D. oxygen
devlian [24]
<span>The </span>abundance of a chemical element<span> is a measure of the </span>occurrence<span> of the </span>element<span> relative to all other elements in a given environment. Abundance is measured in one of three ways: by the </span>mass-fraction<span> (the same as weight fraction); by the </span>mole-fraction<span> (fraction of atoms by numerical count, or sometimes fraction of molecules in gases); or by the </span>volume-fraction<span>. Volume-fraction is a common abundance measure in mixed gases such as planetary atmospheres, and is similar in value to molecular mole-fraction for gas mixtures at relatively low densities and pressures, and </span>ideal gas<span> mixtures. Most abundance values in this article are given as mass-fractions.

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8 0
3 years ago
What is the correct formula and charge for the polyatomic ion called acetate
DedPeter [7]

Answer:

5.03 Naming Compounds that contain Polyatomic Ions

Explanation:

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6 0
2 years ago
Metallic elements can be recovered from ores that are oxides, carbonates, halides, or sulfides. Give an example of each type.
vredina [299]

Metallic elements which can be recovered from ores that are oxides, carbonates, halides, or sulfides are iron, zinc, silver and lead respectively.

Ores which is deposited in earth's crust which contain minerals and metals. Metals can be obtained economically and sold commercially.

<h3>How metals obtained from sulphide or carbonate ore? </h3>

As we get to know that it is easy to obtain metals from their oxides. So, firstly ores which is found in the form of carbonates and sulphide are converted into their oxides by using the process of calcination and roasting.

The metals which is in the middle of the activity series are moderately reactive. These metals are found in the crust of the earth is mainly found as oxides, sulphides, or carbonates.

A metal which can occur in the form of sulphide ore is lead.

A metal which can occur in the form of oxide ore is iron.

A metal which can occur in the form of carbonate ore is zinc.

A metal which can occur in the form of halides ore is silver.

Thus, we concluded that the metallic elements which can be recovered from ores that are oxides, carbonates, halides, or sulfides are iron, zinc, silver and lead respectively.

learn more about ore:

brainly.com/question/10306443

#SPJ4

6 0
1 year ago
What is the balanced form of the chemical equation shown below?
Svetradugi [14.3K]

Answer:

D

Explanation:

Double Displacement reaction

Both sides are balanced with option D

3 0
3 years ago
How many neutrons are there in Phosporus-15?
Arada [10]
Phosphorus has 16 neutrons. Phosphorous is 15 on the periodic table, which means that the atomic number (number of protons) of phosphorous is 15.

For more info: https://study.com/academy/answer/what-is-the-number-of-neutrons-in-phosphorus.html
6 0
3 years ago
Read 2 more answers
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