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11111nata11111 [884]
3 years ago
9

Can someone tell me what to write for here ?

Chemistry
1 answer:
professor190 [17]3 years ago
5 0
Because when the seed lands it reproduces
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What is the frequency of an electromagnetic wave that has a wavelength of 4.55x10-3m
djverab [1.8K]

Answer:

hnjilbglu

Explanation:

nbjl,bhuk

5 0
3 years ago
Helpppppppppppppp please
Mama L [17]
1)
-Lithium: Lithium got 3 protons, so it atomic number is 3. It is located on the first column of the periodic table, and belonging to the alkali metal. So lithium is a metal. Lithium is highly reactive.
-Neon: It is located on the 18th column of the periodic table, and belong to the noble gases. So Neon is a nonmetal. Neon's reactivity is very low.
-Fluorine: Located on the 17th column of the periodic metal, fluorine is a nonmetal, and belong to the halogen family. Fluorine's reactivity is high.

2)
-Vertical columns of the periodic table are called columns. There is 18 column in the periodic table, and each one represent a chemical family.
-Horizontal rows of the periodic table care called periods. There is 7 periods in the periodic table.
-The number of protons in an atom is that element's atomic number. And since the atom is electrically neutral, the number of protons is equal to the number of electrons. So if you have the number of electrons, you can still find the atomic number.
-The total of protons and neutrons in an atom is that element's atomic mass. Based on the formula A = Z + N, where A represents the atomic mass, Z the atomic number (number of protons) and N the number of neutrons.
-The elements in group 1 are the most reactive metals. This group is called the Alkali metals. They only have 1 electron in their outer shell which makes them always ready to lose an electron in an ionic bonding.
-The elements in group 17 are the most reactive nonmetals. This group is called the Halogens, with 7 electrons in their outer shell which makes them always ready to win an electron in an ionic bonding.
-The elements in group 18 are the most unreactive elements. This group is called the Noble gases. Their outer shell is always full, so it can't do reactions.

Hope this Helps! :)

4 0
3 years ago
Find the volume of 56.0 grams of O2
N76 [4]

Answer:

39.2 L at STP

Explanation:

Convert the grams to moles first by dividing 56.0 by the molar mass of O2 (32.0) then convert to volume by multiplying by 22.4.

= 39.2 L

5 0
3 years ago
Write isotopic symbols in the form AZX for each isotope. a. the copper isotope with 34 neutrons b. the copper isotope with 36 ne
krek1111 [17]

Explanation:

The form AZX denoted that;

Z = The atomic number or proton number (symbol Z) of a chemical element is the number of protons found in the nucleus of every atom of that element.

A = Mass Number ( Sum of Neutrons and Protons)

X represents the element.

A. the copper isotope with 34 neutrons

X = Cu

Atomic Number of Copper, Z = 29

Mass Number, A = 29 + 34 = 63

63.29.Cu

B. the copper isotope with 36 neutrons

X = Cu

Atomic Number of Copper, Z = 29

Mass Number, A = 29 + 36 = 65

65.29.Cu

C. the potassium isotope with 21 neutrons

X = K

Atomic Number of Potassium, Z = 19

Mass Number, A = 19 + 21 = 40

40.19.K

D. the argon isotope with 22 neutrons

X = Ar

Atomic Number of Argon, Z = 18

Mass Number, A = 18 + 22 = 40

40.18.Ar

5 0
3 years ago
Give a full note on Global warming​
QveST [7]

Answer:

Global warming is a gradual increase in the earth's temperature generally due to the greenhouse effect caused by increased levels of carbon dioxide, CFCs, and other pollutants.

Global warming is the long-term heating of Earth's climate system observed since the pre-industrial period (between 1850 and 1900) due to human activities, primarily fossil fuel burning, which increases heat-trapping greenhouse gas levels in Earth's atmosphere.

Since the pre-industrial period, human activities are estimated to possess increased Earth’s global average temperature by about 1 degree Centigrade (1.8 degrees Fahrenheit), variety that's currently increasing by 0.2 degrees Celsius (0.36 degrees Fahrenheit) per decade. Most of the present warming trend is extremely likely (greater than 95 percent probability) the results of act since the 1950s and is proceeding at an unprecedented rate over decades to millennia.

Climate change may be a long-term change within the average weather patterns that have come to define Earth’s local, regional and global climates. These changes have a broad range of observed effects that are synonymous with the term.

Global warming occurs when CO2 and other air pollutants and greenhouse gases collect within the atmosphere and absorb sunlight and radiation that have bounced off the earth’s surface.

Normally, this radiation would escape into space — but these pollutants, which may last for years to centuries within the atmosphere, trap the warmth and cause the earth to urge hotter. That's what's referred to as the atmospheric phenomenon.

Melting glaciers, early snowmelt, and severe droughts will cause more dramatic water shortages and increase the danger of wildfires. Rising sea levels will cause coastal flooding on the Eastern Seaboard, especially in Florida, and in other areas.

Forests, farms, and cities will face troublesome new pests, heat waves, heavy downpours, and increased flooding. All those factors will damage or destroy agriculture and fisheries. Disruption of habitats like coral reefs and Alpine meadows could drive many plant and animal species to extinction.

~ extracted from Global warming documentary.

Climate change encompasses not only rising average temperatures but also extreme weather events, shifting wildlife populations and habitats, rising seas, and a variety of other impacts. All of these changes are emerging as humans still add heat-trapping greenhouse gases to the atmosphere, changing the rhythms of climate that each one living things have come to believe.

5 0
2 years ago
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