CHEMISTRY MIDDLE SCHOOL

Which atomic number corresponds to the element which is most stable?1
3
8
16
36

Answers

Answer 1

Answer:

Answer:

Explanation:

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Answer 2

Answer:

Answer:

Explanation:

This is a simple answer, but I assure you that it is 100% correct.

Hope this helps you.

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Where is air pressure greater- In the Exosphere or Troposphere

Answers

The exosphere has greater air pressure becuase it higher above sea level. The tropshere is what we are living in now.

Which of the following supports the theory of continental drift?The depth of the oceans
The climate of the South American continent
The size of glaciers in Alaska
The fossil record

Answers

The answer to this question is the fossil record because they found fossils in different continents because of continental drift

Hello :) So the continental drift theory is basically saying that the continents were once attached in a big mass of land and drifted apart over time. The depth of the oceans don't really have anything to do with this. Neither does the climate in South America or the size of glaciers. Fossils of the same kind however, were found in several continents. This supports the theory that animals once roamed around in that area when the continents were attached. Hope this helps. :D

Which formula represents an organic compound?( l) CaH2 (3) H2O2

(2) C4H8 (4) P2O5

Answers

Answer: The correct answer is Option 2.

Explanation:

Organic compounds are defined as those compounds in which a covalent bond is present between hydrogen and carbon atom. They are basically known as hydrocarbons. If any atom other than hydrogen and carbon is present, it is not considered as an organic compound.

From the given options:

Option 1: $CaH_2$

A, calcium atom is present, so it is not considered as an organic compound.

Option 2: $C_4H_8$

As., only carbon and hydrogen atom is only present, so it is considered as an organic compound.

Option 3: $H_2O_2$

As, oxygen atom is present, so it is not considered as an organic compound.

Option 4: $P_2O_5$

As, phosphorous and oxygen atoms are present, so it is not considered as an organic compound.

From the above information, the correct answer is Option 2.

The formula (2) $C_4H_8$ represents an organic compound.

What is an Organic compound

Organic compounds are compounds that primarily consist of carbon (C) and hydrogen (H), along with other elements such as oxygen, nitrogen, sulfur, and others. The formula $C_4H_8$ represents an organic compound that contains four carbon atoms (C₄) and eight hydrogen atoms (H₈).

These examples represent a small fraction of the vast array of organic compounds found in nature and synthesized in laboratories.

Hence we can say that option 2 is right. $C_4H_8$ represents an organic compound.

Read more on Organic compound here brainly.com/question/6279332

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Describe three properties of a frozen fruit bar including its state of matter.

Answers

The state of matter of a frozen fruit bar is solid. One property of solids is that they have a fixed shape, because the particles are tightly compressed and cannot move about. Another property is that solids can’t be compressed, because the particles have no space to move as a result of the compression. The frozen fruit bar has no free electrons so, like most other solids, it cannot conduct electricity.

What are some examples of Radiation?

Answers

Examples of Everyday Radiation
Non-ionizing Radiation
Visible light
Infrared light
Near ultraviolet light
Microwaves
Low frequency waves
Radio waves
Waves produced by mobile phones
A campfire's heat
Thermal radiation
Extremely low frequency waves (3 - 30 Hz)
Very low frequency waves (3-30 kHz)
Power lines
Strong magnets
MRI
LEDs
Lasers
Light bulbs
Light from the sun
Remote controls
Cordless phones
Radio-frequency radiation such as televisions, FM and AM radio
Shortwave and CB's
Computer screens
Infrared lamps use to maintain food temperature in restaurants
Ionizing Radiation
Ultraviolet light
X-rays
Gamma-rays
Radioactive decay's particles
Cosmic rays
Alpha rays
Beta rays
Medical imaging equipment
Ionization of food
Sterilization of medical tools
Nuclear power production
Metal mining can result in exposure to ionizing radiation
Coal mining and power production from coal
Nuclear weapons
Galactic Cosmic Radiation (to which astronauts are exposed)
Solar Particle Event radiation (to which astronauts may be exposed)
Natural background radiation
Radiation therapy for specific forms of cancer
Radon
CT scans
Nuclear medical scans
X-Rays
Airport security scanners (in extremely high usage)

examples of radiation would be:

ultraviolet light from the sun.

heat from a stove burner.

light from a candle.

x-rays from an x-ray machine.
alpha particles emitted from the radioactive decay of uranium.

Name five kinds of landforms caused by plate movement, help!!