Chemistry, 29.06.2019 11:00 matt3987

Arrange the measurements from least to greatest. 1.8 micrograms 1.8 grams 1.8 milligrams 1.8 kilograms

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Answer from: lorrainelopez

The order follows: $1.8\mu g<1.8mg<1.8g<1.8kg$

Explanation:

Gram is unit which is used to expressed mass of a substance. Many other units can be used to express the mass of a substance. All the units are inter changeable.

For the given values:

Option 1: 1.8 micro grams

Conversion factor from Gram to micro gram

$1\mu g=1\times 10^{-6}g$

So, $1.8\mu g=1.8\times 10^{-6}g$

Option 2: 1.8 grams

All other units are expressed in this standard unit of mass and then, it will be compared.

Option 3: 1.8 milligrams

Conversion factor from Gram to mili gram

1mg=0.001g

So, 1.8mg=0.0018g

Option 4: 1.8 kilograms

Conversion factor from Gram to mili gram

1kg=1000g

So, 1.8kg=1800g

Hence, the order follows: $1.8\mu g<1.8mg<1.8g<1.8kg$

Answer from: Quest

assuming that your periodic table has eighteen columns, you should highlight the four elements in the third column from the left of the table.

explanation

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the $3d$ have energy higher than those in the $4 s$ orbital while lower than those of the $4 p$ orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the $4s$ orbital is therefore filled right after $3p$ orbitals and before $3 d$ orbitals.

potassium has electron configuration $[\text{ar}] 4 s^{1}$ and calcium $[\text{ar}] 4 s^{2}$ . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration $[\text{ar}] 4 s^{2} \; 3d^{1}$ and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the $ns^{2} \; (n-1) p^{1}$ and should be highlighted as well.

Answer from: Quest

Hey how did you manage to type such a big lab report

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Arrange the measurements from least to greatest. 1.8 micrograms 1.8 grams 1.8 milligrams 1.8 kilogr...