Answer:it’s C
Explanation:
I just got it wrong and it showed the the right answer
a. ELEMENT: A substance<span> that </span>cannot<span> be decomposed (</span>broken down<span>) </span>into simpler substances by ordinary chemical<span> means.</span>
Answer:
.
Explanation:
Based on the electron configuration of this ion, count the number of electrons in this ion in total:
.
Each electron has a charge of .
Atoms are neutral and have charge. However, when an atom gains one extra electron, it becomes an ion with a charge of . Likewise, when that ion gains another electron, the charge on this ion would become .
The ion in this question has a charge of . In other words, this ion is formed after its corresponding atom gains two extra electrons. This ion has electrons in total. Therefore, the atom would have initially contained electrons. The atomic number of this atom would be .
Refer to a modern copy of the periodic table. The element with an atomic number of is sulphur with atomic symbol . To denote the ion, place the charge written backwards ("" for a charge of ) as the superscript of the atomic symbol:
.
The atmospheric pressure will be:
The pressure of the atmosphere resulting from the mercury column is 0.959 atm
What is atmospheric pressure?
The force that an object experiences from the weight of the air above it per unit area are known as atmospheric pressure.
Given: Height of mercury column = 729 mm Hg
To find: The pressure of the atmosphere
Calculation:
The atmospheric column resulting from the mercury column is calculated as follows:
1 atm =760 mm Hg
So, we can convert the 729 mm Hg to atm, and we get
Atmospheric pressure = 729 x 1 atm / 760 = 0.959 atm
Learn more about atmospheric pressure here,
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