CHEMISTRY HIGH SCHOOL

How many unpaired electrons does calcium have

Answers

Answer 1

Answer:

Answer:

Explanation:

The number of unpaired electrons in is 0

Answer 2

Answer:

Answer:

4 unpaired electrons

Explanation:

becausd it have 4 unpaired electros it is paramagnetic

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What do alkaline earth elements have in common

Answers

The alkaline earth metals are all of the elements in the second column (column 2A) of the periodic table. This group includes beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba) and radium (Ra). Alkaline earth metals have only two electrons in their outermost electron layer

The right answer is B

One positive attribute of dietary fat is that it's a good source of A. water.
B. vitamin
c.
C. energy.
D. boron.

Answers

C. energy.

One positive attribute of dietary fat is that it's a good source of ENERGY

NOT:
A. water.
B. vitamin
D. boron.

One positive attribute of dietary fat is that it's a good source of C. energy.

In chemical reactions, there is a conservation of(1) energy, volume and mass(2) energy, volume and charge
(3) energy, charge and mass
(4) energy, charge and volume

Answers

Answer: option (3) energy, charge and mass.

Explanation:

1) The conservation of energy is a universal principle: energy is neither created nor destroyed. This is the first law of thermodynamic.

2) Mass conservation is another universal principle: mass is neither created nor destroyed. This principle is the base of the stochiometry: thas mass of the reactans equal the mass of the products. Another consequence, since the atoms are not transformed in the chemical reactions, is that the number of each kind of atoms in the reactants equal the number of the same kind of atoms in the products.

3) The third principle is the conservation of charge. Also, charge is neither created nor destroyed. The electrons gained/lost by one species are lost/gained by other species. So, when one atom or molecule is oxidized other is reduced.

(3) energy, charge, and mass

What are 3 toxicants associated with sewage?

Answers

Final Answer:

Three toxicants associated with sewage are heavy metals, organic pollutants, and pathogenic microorganisms.

Explanation:

1. Heavy Metals: Sewage can contain heavy metals such as lead, mercury, and cadmium, which are often discharged into wastewater from industrial processes and urban runoff. These toxic metals can contaminate water bodies, accumulate in aquatic ecosystems, and pose significant health risks to both aquatic life and humans when consumed through contaminated water or seafood.

2. Organic Pollutants:*Sewage also contains a variety of organic pollutants, including pesticides, solvents, and synthetic chemicals. These substances can originate from household products, industrial discharges, and agricultural runoff. Organic pollutants can have adverse effects on aquatic ecosystems by disrupting the balance of the ecosystem, affecting water quality, and harming aquatic organisms.

3. Pathogenic Microorganisms: Sewage is a potential carrier of pathogenic microorganisms such as bacteria, viruses, and parasites. When sewage is improperly treated or discharged into water bodies without adequate disinfection, it can lead to the contamination of drinking water sources and recreational waters, causing waterborne diseases and infections in humans.

Proper sewage treatment and wastewater management are essential to minimize the release of these toxicants into the environment and protect human health and aquatic ecosystems.

Learn more about organic pollutants

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Answer:

Pathogens,Heavy Metal and Organic Chemicals are all three toxicants associated with sewage

An atom of argon rarely bonds to an atom of another element because an argon atom has(1) 8 valence electrons
(2) 2 electrons in the first shell
(3) 3 electron shells
(4) 22 neutrons

Answers

The answer is (1) 8 valence electrons. Argon, being a noble gas, already possesses a full octet of valence electrons and is, therefore, very, very stable. It has an almost indomitable tendency to retain that octet. That is why it so rarely participates in any sort of bonding.

Make the following conversion.

60.2 mg = _____ g