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Alborosie
3 years ago
8

Which waves have least amount of energy

Chemistry
2 answers:
lora16 [44]3 years ago
3 0
Radio waves have the least amount of energy
Pepsi [2]3 years ago
3 0
The Electromagnetic spectrum lists the most powerful EMR, gamma rays, to the least powerful EMR, radio waves. In addition, the highest energy waves (gamma, x-ray) have the shortest wavelengths. The lowest energy waves, radio waves, have longest wavelengths.
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Based on the chemical equation, use the drop-down menu to choose the coefficients that will balance the chemical equation: ()Na2
anyanavicka [17]

Answer:

The coefficients in order are 2, 1, 1

Explanation:

Each side of the reaction needs to have the same number of each element due to conservation of matter.

First I looked at what was uneven, notice there are 2 Na on the left side and 4 Na on the left. The easiest way to fix that is to add a 2 on the Na2HPO4:

2(Na2HPO4)--> Na4P2O7 + H2O

Next take count of each element on both sides to see if the 2 balanced everything:

On the left there are 4 Na, 2 H, 2 P, and 8 O

On the right there are 4 Na, 2 H, 2 P, and 8 O

Since both sides match, you are done!

7 0
3 years ago
An electron's quantum number falls under which structure classification O macroscopic O subatomic atomic Omicroscopic O none of
Tems11 [23]

Answer:

O subatomic atomic

Explanation:

Each orbitals of an atom and electrons accommodated are described by a set of quantum numbers. These numbers gives the position of an orbital with respect to the nucleus, the shape of the orbital, its spatial orientation and the spin of the electron in the orbital.

The quantum numbers can be used to write proper sub-level notation of an atom.

6 0
3 years ago
Give reason why mendeleev's definition of transition elements is no longer acceptable​
hjlf
Mendeleev's periodic table

Dmitri Mendeleev

Like many scientists working at the end of the 19th-century the Russian chemist Dmitri Mendeleev (1834-1907) was looking for ways to organise the known elements. Mendeleev published his first periodic table of the elements in 1869.

Features of Mendeleev's tables

Mendeleev arranged the elements in order of increasing relative atomic mass. When he did this he noted that the chemical properties of the elements and their compounds showed a periodic trend. He then arranged the elements by putting those with similar properties below each other into groups. To make his classification work Mendeleev made a few changes to his order:

he left gaps for yet to be discovered elements
he switched the order of a few elements to keep the groups consistent
5 0
3 years ago
Which element is classified as an alkali metal?<br> Rb<br> Sr<br> Zr<br> Cl
qwelly [4]
Hi there.

Alkali metals are known as the group 1 elements.

When we know this, we just have to look to group 1 of the periodic table.

Rb (Rubidium) is in group 1; it is classified as an alkali metal.

~
4 0
3 years ago
Read 2 more answers
Please help me with this chem question!!
schepotkina [342]

Answer:

caca123

Explanation:

UM

6 0
3 years ago
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