(9) The number of protons can be used to identify a particular element. The correct option is (2). (10) 88 protons, 138 neutrons, and 88 electrons are present in an atom of radium with an atomic number of 88 and an atomic mass of 226. The correct option is (1).
(9)
The number of protons in an atom, known as its atomic number, is a unique identification for a certain element. Each element has a unique number of protons in its nucleus, which determines its chemical properties and position on the periodic table. This attribute is critical for identifying and classifying items.
Hence, the number of protons can be used to identify a particular element. The correct option is (2).
(10)
Radium has an atomic number of 88, which implies it possesses 88 protons. The number of protons in an element is defined by its atomic number.
Radium has an atomic mass of 226 which signifies the total number of protons and neutrons in the nucleus.
Since radium has 88 protons, the difference between the atomic mass and the atomic number yields the number of neutrons: 226 − 88 = 138.
Because an atom is electrically neutral, it has the same number of protons and electrons. As a result, radium possesses 88 electrons.
Hence, 88 protons, 138 neutrons, and 88 electrons are present in an atom of radium with an atomic number of 88 and an atomic mass of 226. The correct option is (1).
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Part E Examine the image at the top of the article. The round object on the right shows how an invisibility coating will work. How are scientists trying to change the path of light? Do scientists want the coating to emit or reflect light? heLp please
Answer: Reflecting the light
Answer:
Scientists want the invisibility coating to guide light around an object. They don’t want the coating to emit or reflect light.
PLATO ANSWER
Explanation:
Scientists want the coat of invisibility to show light around objects. They don't want the coat to emit or reflect light
Differently Worded Answer
The magnetic field produced by a bar magnet can be made visible using iron filings, which align to the magnetic field, as shown in the image above.
How does the magnetic field in the image compare to Earth's magnetic field?
a.The bar magnet has two poles at W and Y, and the magnetic field produced by Earth also has two poles and looks similar to the bar magnet.
b.The bar magnet has two poles at W and Y, but the magnetic field produced by Earth has three poles and looks different from the bar magnet.
c.The bar magnet has three poles at W, X, and Y, and the magnetic field produced by Earth also has three poles and looks similar to the bar magnet.
d.The bar magnet has three poles at W, X, and Y, but the magnetic field produced by Earth has two poles and looks different from the bar magnet.
Answer:
c
Explanation:
Answer:
C
Explanation:
Do allergen-free pillows cause fewer germs to grow?
Why do you think this experiment fits in the category of life science?
HEEEEELP PPPPPLLLLLZZZZZ
Moving the ball with short pushes by the inside or outside of either foot is defined as:
A.Kicking
B.Dribbling
C.Heading
D.Trapping
Answer:
dribbling
Explanation:
Answer:
b
Explanation:
Please help me give a summary for trees lessons as I (cody) have a quiz Tommorow
Sientific method
Conduction,convection, and radiation
Energy transformations
Law of conversion of energy
Answer:
Conduction is heat transfer through stationary matter by physical contact. (The matter is stationary on a macroscopic scale—we know that thermal motion of the atoms and molecules occurs at any temperature above absolute zero.) Heat transferred from the burner of a stove through the bottom of a pan to food in the pan is transferred by conduction.
Convection is the heat transfer by the macroscopic movement of a fluid. This type of transfer takes place in a forced-air furnace and in weather systems, for example.
Heat transfer by radiation occurs when microwaves, infrared radiation, visible light, or another form of electromagnetic radiation is emitted or absorbed. An obvious example is the warming of Earth by the Sun. A less obvious example is thermal radiation from the human body. I hope this helps you
Explanation:
Explain how scientists are able to estimate the age of the solar system.
They use radioactive dating with samples of meteorites.
They use relative dating with the layers of the moon's surface.
They use radioactive dating with samples of moon rock.
They use relative dating with the layers of the Earth's surface.
Scientists are able to estimate the age of the solar system by the use of radioactive dating with samples of meteorites. Hence, option A is correct.
What is Radioactive Dating?Radioactive isotopes are used in radioactive dating to determine the age of rocks and minerals. For igneous and metamorphic rocks, which cannot be dated using the stratigraphic correlation approach for sedimentary rocks, this method is helpful.
The atomic nucleus becomes unstable and releases bits and pieces during radioactive decay, which is a natural process. As radioactive particles, they are discharged (there are many types). The atom becomes stable when the number of protons and neutrons in the nucleus is balanced as a result of this decay process.
To try and determine the age of the Solar System, we can look at the oldest meteorites or those that exhibit the most severe lead ratios; if we do so, we find that the age is approximately 4.568 billion years. Rocks from the Moon, which have not experienced the same geological processes as rocks from Earth, are available for examination.
Hence, it concludes that option A is correct.
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True or False
A penalty kick is awarded if any defensive player (other than the goalie) touches the ball inside the penalty area
Answer:
T?
Explanation:
A penalty kick is a direct free kick awarded to the attacking team when the defensive team commits a foul in the penalty area. It is taken from the penalty spot and all players except the goalkeeper and the player taking the kick must stand outside the penalty area, at least 10 yards from the penalty spot.
What is the formula to calculate the GPE of an object?
Answer:
mass x gravity x height
Explanation:
Gravitational potential energy is measured in jules
Which air mass is responsible for bringing warm, moist air to an area?
Question 28 options:
Air Mass B
Air Mass D
Air Mass C
Answer:
Pretty sure it is air mass C
Explanation:
It looks like yhe air has warm air where as the other 2 options have cold air.
Which of the following statements best describes the movement of particles in a liquid?
A.
they do not move
B.
they vibrate
C.
they slide around each other
D.
they fly around freely
Answer:
C
Explanation:
Hope this helps :)
Matter is anything that is made up of atoms. The matter word is mainly used in science. Therefore Option C are correct option.
What is matter?Matter is a substance that has some mass and can occupy some volume. . Matter can be solid, liquid or gas.
In case of solid, particles are fixed at its mean position, they do not move at all. In gas, particles move very fast. They do not remain at its mean position. They continuously keep on moving with high kinetic energy called Brownian motion. In liquid particles are moveable, they are neither very stiff nor they move very fast. There is surface tension between the particles and the layers of liquid. Therefore, the layers of liquid just slide around each other. And this property of liquid is the reason for its fluidity.
Thus option c is correct option
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PLEASE ANSWER You are in a vehicle waiting at a railroad crossing and notice a train going by at a constant speed of 5 kph. You happen to notice that there’s no engineer driving the train and it seems to be on auto pilot. Down the track in the direction the train is traveling, you see a Humane Society van full of cute puppies and kittens stalled out on the tracks. Are the van’s passengers in trouble or not? Use Newton’s 2nd Law to explain.
What is something that is artificially pressurized to to outside air pressure, no links.
The anwser is a plane because it protects pilot, crew and passengers from hypoxia.