Answer:
The correct answer is A.
Explanation:
The periodic table published by Mendeleev in 1869 was the first periodic table to group the elements. Based on the hypothesis that the properties of the elements are a periodic function of their atomic weights, he placed in the table all the elements known up to that moment, which became 63 elements, ordering them in such a way that the elements belonging to the same family appear in the same vertical line. The elements were arranged in the increasing order of their atomic masses.
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Answer:
1. The body's immense blood supply (when blood vessels dilate or become larger heat loss occurs) When the blood vessels constrict it holds in heat
2. The skins blood supply also helps maintain body temperature (helps maintain homeostasis which is the "normal" state of our body)
3. Humidity in the air effects thermoregulation (heat regulation in the body) by limiting sweat evaporation (usually sweat evaporates into the environment when the humidity is low because the air has low "water levels" per say while you have high "water levels" because of your sweat
are easily recycled
can eventually be used up
never cause pollution
Non-renewable energy sources CAN EVENTUALLY BE USED UP.
Non renewable energy sources refer to those energy sources that can not be replenished. Once they are used up, new one can not be formed or produced, this is because they can only be formed by natural processes and these processes take millions of years to occur. Examples of non renewable energy sources are: coal, natural gas and oil. All the fuels obtained from fossils are non renewable in nature.
Answer:
The correct answer is option C, can eventually be used up
Explanation:
Nonrenewable energy sources are those resources which if once used cannot be re used again.
For example – Coal, petroleum(petrol & diesel), fossils, natural gas etc.
These resources cannot be replenished if once they are consumed as they take millions of year to form.
Also all these resources are made up of hydrocarbons thus they produce polluting gases on burning except natural gas.
The element that has maximum density at STP is copper.
Further explanation:
The property is a unique feature of the substance that differentiates it from the other substances. It is classified into two types:
1. Intensive properties:
These are the properties that depend on the nature of the substance. These don't depend on the size of the system. Their values remain unaltered even if the system is further divided into a number of subsystems. Temperature, refractive index, concentration, pressure, and density are some of the examples of intensive properties.
2. Extensive properties:
These are the properties that depend on the amount of the substance. These are additive in nature when a single system is divided into many subsystems. Mass, energy, size, weight, and length are some of the examples of extensive properties.
Density is a characteristic property of the substance. It is defined as the mass per unit volume. It is generally represented by .
The formula to calculate the density of the liquid is,
Standard Temperature and Pressure is denoted as STP and the volume of 1 mole of gas at STP is 22.4 litres.
The volume is constant and therefore density is directly related to mass.
Among the given elements copper has the highest molar mass and that is . Therefore the element that has maximum density at STP is copper.
Learn more:
1. Calculation of density: brainly.com/question/778841
2. Determine how many moles of water produce: brainly.com/question/1405182
Answer details:
Grade: Middle School
Subject: Chemistry
Chapter: Density
Keywords: density, mass, volume, STP, intensive, extensive, characteristic property, element, copper, chlorine, calcium, and carbon.