There are five Family on the periodic table that are alkali metals , Alkaline earth metals , transition metals , Halogens family and noble gas family.
1) In alkali metals, there are six elements are present and among all the elements Sodium metal should be selected. Because sodium metal is most abundant metal in the world.
- uses of sodium are
- sodium salt are common salt that added to the food to enhance the taste.
- washing soda are made up of sodium salt which is used as water softener.
- sodium salts are also used as buffer to maintain Ph.
2) In alkaline earth metal family, The magnesium element should be selected.
- uses of magnesium are
- since magnesium is a soft metal so it can burn easily therefore it is used in fire works.
- magnesium is also important for proper growth and maintenance of bones.
- Magnesium is light weight metal so it can used to make car seat , luggage and power tools etc.
3) In Halogens gas family , chlorine should be selected.
- Uses of chlorine are
- The chlorine is used in cleaning purpose as it act as bleaching agent.
- Chlorine is also used to prepare the pesticides to removes pest in crops.
- In refrigerators, the cold breeze is coming out is chlorine gas which are used to increase the shelf life of the plants.
4) In transition metals , copper metal should be choose.
- Use of copper metal are
- Copper is highly ductile metal so it drawn into wires and used in various electrical purpose.
- The copper has anti corrosive properties so it can used in making kitchen utensils.
- The copper has anti microbial property so it can used in packaging of food.
5) In noble gas elements, The helium gas should be selected
- uses of helium gas are
- It used as semiconductors.
- It used in party balloons.
- The helium is inert gas so it used to make optical fibers.
These are the daily life usage of all the elements of each family of the periodic table.
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Hello,
The answer is option A "<span>the heat from the stove".
Reason:
The answer is option A because the variable the heat from the stove is causing the ice to change into water. Its not option B because thats not in the procedures. Its not option C because it is not a variable. Its also not D because thats also not a variable.
If you need anymore help feel free to ask me!
Hope this helps!
~Nonportrit</span>
The scientific models are used because they allow scientists to make predictions and make it easier for scientists to avoid using data. option A and C is correct.
<h3>What are scientific models?</h3>
The scientific models are those which is given by scientists to allow them to make prediction about anything particular on which they are working or making research for it some examples are plum pudding model for an atom and bohr's model of an atom etc.
The biggest advantage is that scientists do not have to check the given data which are written into books they can perform their experiment and can conclude the data by performing experiment.
Therefore, scientific models are used because they allow scientists to make predictions and make it easier for scientists to avoid using data. option A and C is correct.
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The first answer choice is correct: SF6 is a compound: it is a substance composed of more than one atom from different elements (sulfur and fluorine).
The second answer choice is incorrect: while SF6 is indeed a compound that contains seven atoms, those atoms are not identical since one is a sulfur atom and six are fluoride atoms.
The third answer choice is incorrect: SF6 is not an element because it can be separated chemically into simpler substances that are elements. All the atoms comprising an element must have the same number of protons (the same atomic number); sulfur and fluorine have different atomic numbers. There is no single nucleus in SF6; the S and six F atoms each has their own nucleus.
The fourth answer choice is incorrect; SF6 contains no carbon atom, and so wouldn’t meet a central criterion for an organic compound. Moreover, the formula SF6 indicates that the sulfur atom is not bonded to any other atom apart from fluorine atoms, and there are no bonding electrons left on the S. There is no plausible reason to think that a molecule with such weak intermolecular attractions as SF6 would form long chains of S atoms. Indeed, in standard conditions, SF6 is a gas.
Answer:
a) To determine the facilities that contribute the most to recycling check the pie chart and select the facility with the largest portion while to determine the facilities that contribute the least to recycling check the pie chart and select the facility with the smallest portion
b) Energy is saved because the products which are recycled usually require less energy to turn them into usable materials
c) It saves energy through recycling. It helps sustains the environment. It decrease the emission of green house gases
Explanation:
The question is not complete
a) Pie chart is the graphical representation of information in which the information is represented in a circle. The circle is divided into segments and the portion with the largest segment has the highest percentage.
To determine the facilities that contribute the most to recycling check the pie chart and select the facility with the largest portion while to determine the facilities that contribute the least to recycling check the pie chart and select the facility with the smallest portion
b) Extraction and processing of raw resources to make end products requires a lot of energy. With recycling energy is saved because the products which are recycled usually require less energy to turn them into usable materials
c) It saves energy through recycling. It helps sustains the environment. It decrease the emission of green house gases.
