true or false: Halogens are very stable because they have a full outer shell of 8

The wavelength of the radiation whose frequency is 5 X 10^15s^-1 is 2.4 X 10^-6 inches, or 60 nanometers.

Answer:

The only one I know is NaC2HO4.

There is Sodium, Carbon, Hydrogen and Oxygen.

1 atom in sodium, 2 atoms in carbon, 1 atom in hydrogen and 4 atoms in oxygen completeting the total of 8 atoms in this element.

The elements are the simplest chemical forms and they cannot be broken down through chemical reactions. There are many elements in the given formulas.

The elements are defined as those substances whose atoms all have the same number of protons. The elements are considered as the building blocks of matter. Each element has an atomic number and a symbol.

Each atom is regarded as an element. The elements create bonds to form molecules. The isotopes are the elements with the same atomic number but different mass numbers.

NaC₂HO₄  - 'N' , 'C', 'H','O'

H₂F₅BLi - 'H','F','B','Li'

He₂PSO₄ - 'He', 'P','S','O'

He₂O₄PH - 'He', 'O','P','H'

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2Al+6HCl ->2AlCl3+3H2      .nAl=m/M=13,5/27=0,5(mol) =>nH2=0,5.3/2=0,75(mol)....VH2=n.22,4=0,75.22,4=16,8(lít)...

Answer: It has to be stratosphere because This region of the atmosphere is called the stratosphere. It is present in stratosphere According to NASA earth have 6 atmospheric layers..the layer just above the earth is troposphere and above this layer is the stratosphere.

Explanation:

The atomic number of fluorine is 9.

The charge number of an atomic nucleus is known as the atomic number or nuclear charge number of a chemical element. It will be is equal to the proton number of every atom of that element, for ordinary nuclei. Atomic number helps to getting information of elements with the aid of periodic table.

Atomic number = count of proton

It is known that the atomic number of fluorine is 9 . therefore, the answer will be atomic number.

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Explanation:

a) blue litmus paper turns red when u add acid in it .

b) red litmus paper , when an alkali dissolves in water it produce hydroxide ions

which cause it to become a alkaline

Answer: Iron

Explanation: does not react with water, but hydrochloric acid will dissolve them, displacing the hydrogen from the HCl. Iron reacts with hydrogen chloride to produce iron chloride, FeCl2 — sometimes known as ferrous chloride.

To solve such this we must know the concept of chemical reaction. Iron is the metal, which dissolves in hydrochloric acid to produce hydrogen gas, but does not react with steam.

Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.

When metals react with acid the liberation of hydrogen gas take place.  Metal which is at top of reactivity series react with both acid and steam or liquid water. Iron is the only metals which dissolves in hydrochloric acid to produce hydrogen gas, but does not react with steam or liquid water.

Therefore, iron is the metal, which dissolves in hydrochloric acid to produce hydrogen gas, but does not react with steam.

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Answer:

two oxygen atoms on the left side of the arrow

Answer:

Increase

Less/low number

Lessen

Explanation:

Increase > Increase in temperature cause increase in volume.

Less/low number > As volume increases the number of particles to be adjusted in the same space will be lesser than before.

Lessen> At constant pressure as increase in temperature cause increase in volume so the density will lessen due to increase in volume. Density equation is given below.

Density = mass /volume

If volume increases density will get lowered.

Answer:

the 3rd option is the answer

Answer:

D. 1, 2, and 3

Explanation:

Answer:

A - X Only

Explanation:

Answer:

vibrio vulnificus and vibrio

Explanation:

Answer:

vibrio vulnificus and vibrio parahaemolyticus

When Stephen Hawking was diagnosed with ALS at age 21, he knew he had little time left. But he also knew he wanted to do so much more first. With these circumstances, he learned the importance of carpe diem .

Answer:

Savory. Savory taste is caused by amino acids. It's commonly brought on by aspartic acid or glutamic acid. Occasionally, savory is also called “umami” or “meaty.”

Explanation:

Hope this helps.

Answer:

it would be 615

Explanation:

Answer:

ok i will do the instructions

Explanation:

Answer:

Make sure that its an accepted file. If not try to refresh the page.

Answer:

remain at rest

Explanation:

Answer:

Comparison of whole genome sequences provides a highly detailed view of how organisms are related to each other at the genetic level.

Explanation:

Answer:

23: 6000560000000

24: 0.0015

25: 200

26: 0.0105

27: 600

28: 4023000

Explanation:

You have to move the decimal the same amount of times as the exponent says.

For example, like with the 6, you move it 2 decimals to the right (since it's positive), and the regular number would be 600.

Answer:

I think the answer is 138.11 gram

Explanation:

Answer:

1

Explanation:

Any digit that is not 0 is always significant

Answer:

yes

Explanation:

because

Answer:

A metal oxide with formula K2O. Potassium oxide (K2O) is an ionic compound of potassium and oxygen. It is a base. This pale yellow solid is the simplest oxide of potassium.

Answer:

H is monoatomic

while H2 is di-atomic

Answer:

Copper is a metal made up of copper atoms closely packed together. As a result, the electrons can move freely through the metal. For this reason, they are known as free electrons. They are also known as conduction electrons because they help copper be a good conductor of heat and electricity.

Explanation:

Answer:3

Explanation: