Answer:
The correct answer is option C.
Explanation:
Atomic number(Z) = Total number of protons present in a nucleus of an atom.
Atomic mass(M) = Sum of protons and neutrons present in the nucleus
M = Z + Total number of neutrons
If we are given with mass number of an element and we are said to determine the atomic number of the compound:
22 = Z + Total number of neutrons
Z = 22 - Total number of neutrons
We will require total number of neutrons to determine the atomic number of an unknown elementthat has a mass number of 22.
(2) parts per million
(3) grams per Kelvin
(4) joules per gram
Answer:
(2) parts per million
Explanation:
Concentration of a solution can be expressed in terms of parts-per-million (ppm).
ppm is usually used in the context of measuring very small concentrations particularly the amount of contaminants. It represents 1 part of the contaminant in 100000 parts of the total.
It is expressed as:
1 ppm = 1 mg / L
1 ppm = 1 mg/ Kg
B. a ball being thrown at 100 miles per hour.
C. a ball on top of a refrigerator
D. a ball resting on the Edge of a cliff.
Answer:
D, if the cliff is higher than the refrigerator
Explanation:
Answer:
Clouds generally form within the troposphere.
Explanation:
A cloud is a mass of water droplets, ice crystals or both at the same time, which remains in suspension in the atmosphere, and whose formation is due to the condensation of water vapor in the sky.
Clouds form when the air is saturated and can no longer contain water vapor, this can happen in two ways:
1. The amount of water in the air has increased.
2. The air cools to its dew point.
Clouds generally form within the troposphere.
A strong acid is safe as long as it's in a dilute solution
Elements can be identified by their atoms through their atomic number, atomic mass, and chemical symbol, all of which are represented on the periodic table. The unique number of protons in an element's atomic nucleus is also identified. This information, combined with the arrangement of elements in the periodic table based on shared properties, reveals the identities of elements.
Elements are identified by their atoms through certain key properties that are represented on the periodic table. These key identifying properties include the atomic number, atomic mass, and the element's chemical symbol. For instance, in the case of carbon, its symbol (C) and name, its atomic number of six (given in the upper left-hand corner), and its atomic mass of 12.01 are displayed in its designated box in the periodic table.
Each element's unique number of protons in its atomic nucleus also helps identify an element. Additionally, the arrangement of elements in the periodic table provides insight into the elements' shared physical and chemical properties - they are arranged in a series of rows and columns based on these similarities. Atoms of elements can further combine and bond with each other in certain ways, based on these unique properties.
By the twentieth century, it was understood that these properties follow a periodic relationship with the atomic numbers, a concept referred to as the periodic law. A modern periodic table, thus, arranges the elements in ascending order of their atomic numbers and groups atoms with similar properties in the same column.
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