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3 years ago

The larger the wavelength the shorter the frequency. True or false

Chemistry

2 answers:

soldier1979 [14.2K]3 years ago

5 0

Answer:

True

Explanation:

gavmur [86]3 years ago

4 0

Answer:

false

Explanation:A high energy light will have a shorter wavelength than a low energy light. If the wavelength goes down, then the frequency goes up. When calculating energy in the equation, E=hv, frequency

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Is atmosphere nitrogen denser than pure nitrogen

marusya05 [52]

Answer:

Atmospheric nitrogen is not heavier than chemical nitrogen, largely because “chemical nitrogen” is ultimately derived from atmospheric nitrogen. On the other hand, you could be asking why the atomic mass of nitrogen is not the same as the mass of nitrogen gas; that's because gaseous nitrogen is diatomic, .

Explanation:

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3 years ago

Why is bronze considered an alloy?

Serggg [28]

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Find the density of an object that has a mass of 5 kg and a volume of 50 cm3.

iren2701 [21]

Mass=5kg=5000g
Volume=50cm^3

$\\ \rm\longmapsto Density=\dfrac{Mass}{Volume}$

$\\ \rm\longmapsto Density=\dfrac{5000}{50}$

$\\ \rm\longmapsto Density=100g/cm^3$

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3 years ago

Which substances will make a salt when combined?

BartSMP [9]

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3 years ago

Arrange the elements in decreasing order of first ionization energy.

just olya [345]

Answer:

The decreasing order of first ionization energy: Se > Ge > In > Cs

The decreasing order of first ionization energy: x > y > z

Explanation:

Ionization energy refers to the energy needed to completely pull out an electron from the valence shell of a neutral gaseous atom.

First ionization energy is the energy involved in the removal of first valence electron.

In the periodic table, down the group, as atomic radius of elements increases, the ionization energy decreases

Whereas, across a period, as atomic radius of elements decreases, the ionization energy increases.

PART (A):

Position of the given elements in the periodic table:

Indium (In): Group 13, period 5

Germanium (Ge): Group 14, period 4

Selenium (Se): Group 16, period 4

Caesium (Cs): Group 1, period 6

Thus, the increasing order of atomic radius: Se < Ge < In < Cs

Therefore, the decreasing order of first ionization energy: Se > Ge > In > Cs

PART (B):

Given elements:

element x: radius = 110 pm

element y: radius = 199 pm

element z: radius = 257 pm

Thus, the increasing order of atomic radius: x < y < z

Therefore, the decreasing order of first ionization energy: x > y > z

5 0

3 years ago