Arc AB is One-sixth of the circumference of a circle. What is the radian measure of the central angle?A.)StartFraction pi over 6 EndFraction
B.)StartFraction pi Over 3 EndFraction
C.)StartFraction 2 pi Over 3 EndFraction
D.)StartFraction 5 pi Over 6 EndFraction
THE ANSWER IS B!!!
Answers
Answer:
?
Explanation:
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One type of cat has the scientific name Felis domesticus, while another type of cat is called Felis tigris. What can be correctly stated about these two cats?A. They are members of the same species but different genera.B. They are members of the same genus but different species.C. They are members of the same species but different families.D. They are members of the same family but different genera.
(1) O2-
(2) S2-
(3) Se2-
(4) Te2-
Answers
Answer:
Option-1 (O²⁻) is the correct answer.
Explanation:
All given anions contains same charge. So, we can ignore the effect of charge on these anions.
As we know all given compounds belongs to same group (Group 6) in periodic table. And from top to bottom along the group the elements are placed as,
Oxygen O
Sulfur S
Selenium Se
Tellurium Te
Hence, moving from top to bottom along the group the number of shells increases. And with increase in number of shell the atomic or ionic radii increases. As Oxygen is present at the top of the group, therefore, it has the smallest radius due to less number of shells.
O²⁻ ion has the smallest radius
Further explanation
In an atom there are levels of energy in the shell and sub shell.
This energy level is expressed in the form of electron configurations.
Writing electron configurations starts from the lowest to the highest sub-shell energy level. There are 4 sub-shells in the shell of an atom, namely s, p, d and f. The maximum number of electrons for each sub shell is
- s: 2 electrons
- p: 6 electrons
- d: 10 electrons and
- f: 14 electrons
Charging electrons in the sub shell uses the following sequence:
1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d¹⁰, 4p⁶, 5s², 4d¹⁰, 5p⁶, 6s², etc.
Each sub-shell also has an orbital shown in the form of a square in which there are electrons symbolized by half arrows
The atomic radius shows the distance of the atomic nucleus to the electrons in the outer shell
From left to right in the period system the atomic radius gets smaller, while from one group from top to bottom the atomic radius gets longer
The more the number of shells the atom has, the radius of the atom getting longer, but if the number of shells is the same, the larger atomic number has shorter radius because the core charge is greater so that the attraction of the nucleus to the electrons is stronger
In the ions
(1) O²⁻
(2) S²⁻
(3) Se²⁻
(4) Te²⁻
All of these ions are ions from the elements of the VIA group in the periodic system. This group consists of oxygen (O), sulfur (S), selenium (Se), tellurium (Te), and polonium (Po).
The periodic system is arranged in the order of atomic numbers, whereas in this VIA group from top to bottom, the atomic number gets bigger
- Element O
Atomic Number: 8
Electron configuration: 1s² 2s² 2s⁴ (number of shells 2)
- Element S
Atomic Number: 16
Electron configuration: [Ne] 3s² 3p⁴ (number of shells 3)
- Element Se
Atomic Number: 34
Electron configuration: [Ar] 3d¹⁰ 4s²4p⁴ (number of shells 4)
- Element Te
Atomic Number: 52
Electron configuration: [Cr] 4d10 5s² 5p⁴ (number of shells 5)
From the configuration of the electron shows that the lower the shell owned by the elements of the VIA group the greater (from 2 to 5) so that the radius is also getting longer/bigger
Because what is being asked is the radius of the ion, the electron configuration of each element is equally reduced by 2 electrons, but the number of shells remains the same
(1)O²⁻
Electron configuration: 1s² 2s² 2s²
(2) S²⁻
Electron configuration: [Ne] 3s² 3p²
(3) Se²⁻
Electron configuration: [Ar] 3d¹⁰ 4s²4p²
(4) Te²⁻
Electron configuration: [Cr] 4d¹⁰ 5s² 5p²
Because the amount of shell from the Oxygen ion is the smallest, the radius of the O²⁻ is also the smallest
Learn more
electron affinity
Identify the group number in the periodic table
the charge on each ion in the compounds
Keywords: element, group 6A, the smallest radius
Answers
Answer:
The pressure of the gas is 2.11 atm.
Explanation:
From the given,
Therefore, The pressure of the gas is 2.11 atm.
Final answer:
Boyle's law is used to find the new pressure after the gas is compressed from 1.00 L to 0.473 L. The original pressure is 1 atm at Standard Temperature and Pressure (STP). After the compression, the new pressure is approximately 2.12 atm.
Explanation:
The question relates to gas laws, specifically Boyle's law, which states that the pressure of a gas is inversely proportional to its volume when the temperature and amount of gas are held constant. At Standard Temperature and Pressure (STP; 273.15 K and 1 atm), one mole of an ideal gas occupancies a volume of about 22.4 L. In this case, the initial conditions are at STP, with a gas volume of 1.00 L, equating to a pressure of 1 atm. When this volume is compressed to 473 mL (or 0.473 L), the pressure can be determined using Boyle's law, i.e., P1V1 = P2V2. After substituting the values, we can solve for the new pressure (P2) which will be approximately 2.12 atm.
Learn more about Boyle's Law here:
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Answers
decomposition
single displacement
double displacement
Answers
Answer:
decomposition
Explanation:
becoz it is a single compound and it under goes to give two give two or more products
B. electrons than protons
C. neutrons than protons