I have not read the article, and so I don't know in what context this is referring to. But I do know that <span>Infra-sound is made up of a really low frequency sound, beyond the range of hearing by humans. </span>Helpful? :)

6 0

3 years ago

What are all the elements to the left of the zigzag line in a periodic table called?

Kitty [74]

They are called metals

4 0

3 years ago

A metallic bond can exist between atoms that have low ionization energies and

zavuch27 [327]

Answer: The elements that have the lowest electronegativity are the VIII A elements or noble gases. These elements have a theoretical electronegativity of zero. These elements are stable in their electron configuration there is not force moving the noble gases to gain any electrons.

Explanation:

7 0

2 years ago

How many Br atoms are in 1.98 g of Br?

Mkey [24]

Answer:

1.5 x 10²²atoms

Explanation:

Given parameters:

Mass of Br = 1.98g

Unknown:

Number of atoms

Solution:

A mole of a substance is the amount of substance contained in the avogadro's number of particles.

To solve this problem, we must first find the number of moles present in the given mass of the Br atom:

Number of moles = $\frac{mass}{molar mass}$ = $\frac{1.98}{80}$ = 0.025mole.

Now we know that:

1 mole = 6.02 x 10²³

0.025 mole = 0.025 x 6.02 x 10²³ = 1.5 x 10²²atoms

7 0

3 years ago