Which element is least likely to undergo a chemical reactionA) lithium
B) carbon
C) flourine
D) neon
and can you give me a explanation with the answer you chose
Answers
Elements undergo chemical reactions because they are not stable and they want to become stable, that is they want to attain octet form. To attain octet form, an atom of element must have eight electrons in its outermost shell. Thus, elements undergo various types of chemical bonding in order to have 8 electrons in their outermost shells.
Neon has atomic number of 10 and its electronic configuration is 2,8. This means that, neon already has 8 electrons in its outermost shell and so does not need to form any chemical bond with any other element again, it is already stable. This is why, neon is the least likely to undergo chemical reaction and this is also the reason whey the element is chemically inert.
The other elements given in the option do not have 8 electrons in their outermost shell, so they will be quite willing to undergo chemical reactions in order to become stable.
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The force of attraction that the earth exerts on all objects is called
The element carbon is found on the right side of the periodic table and is known as a _________, which means that it is normally a poor conductor of heat and electricity and is dull and brittle.
given that the molar mass of H2O is 18.02g/mol, how many liters of propane are required at STP to produce 75 g of H2O from this reaction?
Which is a substance that is made up of only one type of atom?
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Answer:
Yes; new substances formed, as evidenced by the color changes and bubbles. Some signs of a chemical change are a change in color and the formation of bubbles. The five conditions of chemical change: color chage, formation of a precipitate, formation of a gas, odor change, temperature change
Answers
The alpha decay of Radon-198 produces alpha particle and ¹⁹⁴₈₄Po.
What is alpha decay?
Alpha decay is a type of radioactive disintegration in which some unstable atomic nuclei spontaneously expel an alpha particle to dissipate excess energy.
Alpha decay of Radon-198 is shown as:
¹⁹⁸₈₆Rn → ⁴₂He + ¹⁹⁴₈₄Po
In the above decay from the parent nuclei, daughter nuclei (¹⁹⁴₈₄Po) and alpha particle (⁴₂He) is produced.
Hence daughter nuclei of the alpha decay of Radon-198 is ¹⁹⁴₈₄Po.
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The radon is shown on the left, and the alpha particle, which is a helium nucleus, is shown of the right with the polonium.
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(3) energy, charge and mass
(4) energy, charge and volume
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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.
A. ice floating in a glass of water
B. vapor rising from a hot cup of tea
C. cooled magma sinking in a lava flow
D. a hot air balloon falling as the gas inside cools
Answers
Ice is solid, however, water is liquid. Yet ice still floats which is less dense than water.
Hope this helps!
Answers
P2 =
where, P and T stands for pressure and temperature respectively, terms 1 and 2 indicates initial and final pressure/temperature respectively.
Given that, P1 = 1.5 atm, T1 = 320 K, T2 = 450 K,
∴P2 =
Final answer:
Using Gay-Lussac's Law, we calculate that when the temperature of a gas increases from 320 K to 450 K, the pressure of the gas will increase from 1.5 atm to 2.1 atm, assuming the volume and the amount of gas remain constant.
Explanation:
To answer the question, we need to use the concept in physics called Gay-Lussac's Law. This law states that the pressure of a given amount of gas held at a constant volume is directly proportional to the Kelvin temperature. It's also important to remember that when we're dealing with gases, temperatures have to be in Kelvin for our calculations to work.
Given that, we know that the initial pressure (P1) is 1.5 atm, the initial temperature (T1) is 320K, and the final temperature (T2) is 450K. We want to find the final pressure (P2). According to Gay-Lussac's law, this can be calculated using the following equation: P1/T1 = P2/T2.
Thus, P2 = P1 * T2 / T1 = 1.5 atm * 450K / 320K = 2.1 atm.
So, the gas pressure will be 2.1 atm when the temperature increases from 320 K to 450 K, assuming that the volume and the amount of gas remain constant.
Learn more about Gay-Lussac's Law here:
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