1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ad-work [718]
3 years ago
5

The smallest unit of an element

Chemistry
1 answer:
Sliva [168]3 years ago
8 0
The smallest unit of an element that retains the chemical and physical properties of an element is an Atom.
You might be interested in
What is the movement of water up a narrow tube due to attractions with the surface of the tube called? capillary action meniscus
Shtirlitz [24]

The attraction mediated flow of water in the narrow tube has been termed as Capillary action. Thus, option A is correct.

The process of flowing up of liquid with the attraction force between the molecules and the surface has been achieved with the surface characteristics.

<h3>Movement of water in a narrow tube</h3>

The surface has the force of attraction with the flowing liquids in the sample. It results in the increased surface interaction, and the liquid flows up in the tube against gravity.

The movement of the liquid in the water through a narrow tube has been termed as capillary action. Thus, option A is correct.

Learn more about movement of water, here:

brainly.com/question/1295312

6 0
2 years ago
Examine the system of equations.<br> y = 4x +8,<br> y = 4x-1
storchak [24]
Hope this helps with the answer to your question

5 0
3 years ago
What is the empirical formula for propene (C3H6)?<br> C2H4<br> C4H8<br> C3H6<br> CH2
melamori03 [73]

Answer:

C3H6

Explanation:

please mark me as brainlest

8 0
3 years ago
Read 2 more answers
Can DDT only be synthesized one way?
son4ous [18]

Answer:

DDT (dichloro-diphenyl-trichloroethane) was developed as the first of the modern synthetic insecticides in the 1940s. It was initially used with great effect to combat malaria, typhus, and the other insect-borne human diseases among both military and civilian populations. It also was effective for insect control in crop and livestock production, institutions, homes, and gardens. DDT's quick success as a pesticide and broad use in the United States and other countries led to the development of resistance by many insect pest species.

Regulation Due to Health and Environmental Effects

The U.S. Department of Agriculture, the federal agency with responsibility for regulating pesticides before the formation of the U.S. Environmental Protection Agency in 1970, began regulatory actions in the late 1950s and 1960s to prohibit many of DDT's uses because of mounting evidence of the pesticide's declining benefits and environmental and toxicological effects. The publication in 1962 of Rachel Carson's Silent Spring stimulated widespread public concern over the dangers of improper pesticide use and the need for better pesticide controls.

In 1972, EPA issued a cancellation order for DDT based on its adverse environmental effects, such as those to wildlife, as well as its potential human health risks. Since then, studies have continued, and a relationship between DDT exposure and reproductive effects in humans is suspected, based on studies in animals. In addition, some animals exposed to DDT in studies developed liver tumors. As a result, today, DDT is classified as a probable human carcinogen by U.S. and international authorities.

DDT is:

known to be very persistent in the environment,

will accumulate in fatty tissues, and

can travel long distances in the upper atmosphere.

After the use of DDT was discontinued in the United States, its concentration in the environment and animals has decreased, but because of its persistence, residues of concern from historical use still remain.

Current Status

Since 1996, EPA has been participating in international negotiations to control the use of DDT and other persistent organic pollutants used around the world. Under the auspices of the United Nations Environment Programme, countries joined together and negotiated a treaty to enact global bans or restrictions on persistent organic pollutants (POPs), a group that includes DDT. This treaty is known as the Stockholm Convention on POPs. The Convention includes a limited exemption for the use of DDT to control mosquitoes that transmit the microbe that causes malaria - a disease that still kills millions of people worldwide.

In September 2006, the World Health Organization (WHO) declared its support for the indoor use of DDT in African countries where malaria remains a major health problem, citing that benefits of the pesticide outweigh the health and environmental risks. The WHO position is consistent with the Stockholm Convention on POPs, which bans DDT for all uses except for malaria control.

DDT is one of 12 pesticides recommended by the WHO for indoor residual spray programs. It is up to individual countries to decide whether or not to use DDT. EPA works with other agencies and countries to advise them on how DDT programs are developed and monitored, with the goal that DDT be used only within the context of programs referred to as Integrated Vector Management. EXIT IVM is a decison-making process for use of resources to yield the best possible results in vector control, and that it be kept out of agricultural sectors.

Explanation:

hope this helps

6 0
3 years ago
Which of the following correctly describes a compound?
qwelly [4]

A compound is defined as two or more different elements bonded together in an ionic or covalent bonding arrangement.  Any individual compound has a fixed ratio of its elements.  The elements do not retain their individual chemical properties.  Thus, option "C" is correct.

<h3>What is a compound?</h3>

A substance that has two or more different atoms which are chemically combined with each other in a fixed ratio by mass is known as a compound.

For example,

Here,  contains one atom of calcium and two atoms of chlorine which are chemically combined together in 1:2 ratio. Therefore, it is a compound.

Also, both chemical and physical properties of will be different from Ca and chloride.

Thus, option "C" is correct.

To learn more about compounds click here:

brainly.com/question/13516179

#SPJ1

7 0
2 years ago
Other questions:
  • A gas of unknown identity diffuses at a rate of 155 mL/s in a diffusion apparatus in which carbon dioxide diffuses at the rate o
    12·1 answer
  • Water is a very unique substance because it can exist in all three phases of matter (solid, liquid, gas) within the normal tempe
    15·2 answers
  • CH3COOH mc015-1.jpg CH3COO– (aq) + H+(aq) What will happen to the chemical equilibrium of the solution if CH3COONa is added?
    8·1 answer
  • Do matter take up space?
    13·2 answers
  • The following equation shows the correct molecules formed in the reaction, but the products are incorrect. CH4 +202=H20+ CO2 How
    15·1 answer
  • What are all of the elements that end with F electrons
    12·1 answer
  • In a certain chemical reaction, 297 g of zinc chloride was produced from the single replacement reaction of excess zinc and 202.
    6·1 answer
  • Help please!!!! I need to know the answer to this problem it would mean a lot if u helped :))
    6·1 answer
  • I need you help in this homework
    14·1 answer
  • Which describes a property of water that allows plants to transfer it from their roots to their leaves? Water exhibits weak adhe
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!