Which element is classified as an alkali metal? ​

Answers

Answer 1
Answer:

Answer:

Rb

Explanation:

Alkali metals are in group 1 (the first column on the periodic table) including Li, Na, K, etc.


Related Questions

Used to map mid ocean ridge
What is a magnetic reversal
A chemistry student needs 50.0 g of dimethyl sulfoxide for an experiment. By consulting the CRC handbook of chemistry and physics, the student discovers that the density of dimethyl sulfoxide is 1.10 g×10^-3. Calculate the volume of dimethyl sulfoxide the student should pour out
If a mole of hydrogen reacts with a mole of oxygen to produce water, what is the excess reactant?
What are the problems with studying the structure of the earth?

How many grams of water are produced when 2.50 mol oxygen reacts with hydrogen?H2 + O2 + H2O
Select one:
a. 45.0 g
b. 22.5 g
c. 90.0 g
O d. 3.6 g
PLEASE HELP

Answers

I think the answer is D

Answer:

it is 90.0

Explanation:

Suppose new evidence is found about how Bernoulli's principle works. What is likely to happen?A. The evidence will be ignored.
B. The theory might be modified if necessary.
C. Bernoulli will come up with another hypothesis.
D. Bernoulli's principle will be called "Bernoulli's hypothesis."

Bernoulli's principle is a theory given the name "principle" because _____.
A. it is actually more like a hypothesis
B. nearly all scientists agree that it is correct
C. it is one of the first things you would learn about in college
D. you can't provide evidence for it, but scientists know that it is correct

Answers

Answer:

B. The theory might be modified if necessary.

B. nearly all scientists agree that it is correct

Explanation:

B. The theory might be modified if necessary.

The Bernoulli's principle relates the speed of fluid to their pressures. It simply states that when the speed of fluids increases there is a drop in pressure.

Supposing we find new evidence about how the principle works, the normal scientific thing to do is to modify the existing principle. New information and observations about a principle would only provide a modification to the existing one. An example is the Dalton's atomic theory, which was centered on the atom being the smallest indivisible particle: the theory was later modified when new ideas about the atom surface.

B. nearly all scientists agree that it is correct

Before a hypothesis is adopted to the context of scientific principle, the ideas behind it must have tested and must be repeatable. Different sources will verify the authenticity of such scientific claim to see if such can be adopted. Therefroe, nearly a large numbr of scientists must agree that it is correct.

A mole or fraction of a mole represents a ____ number of atoms or molecules.A : specific

B : nonspecific

Answers

Answer:

specific

Explanation:

a mole represents the amount of grams it takes to have avogadro's number

Answer:

A is your answer

Explanation:

Name at least 4 other gases in the atmosphere besides oxygen and nitrogen

Answers

HELIUM
KRYPTON
CARBON DIOXIDE
HYDROGEN
Argon,Carbon dioxide,Neon,Helium, and Methane

If we know the total energy in a system is 30 j, and we know the PE is 20 j, what is the KE?

Answers

30j-20j= 10j 

The kinetic energy is 10 joules

The total energy is equivalent to PE+KE. Therefore the answer is 10 joules.

The anticodon is the three-base code on the tRNA molecule that binds to the codon on mRNA. What is the associated codon for the anticodon UUA?

Answers

It is AAU
A-U
U-A
C-G
G-C
The associated codon is AAU