As a radioactive element emits gamma radiation only, the atomic number of the element increases or decreases
Answers
Radioactive elements are the unstable nuclei of the atoms that release energy and radiation. The atomic number remains the same in case of the gamma radiation.
What is gamma decay?
Gamma radiations are the particles that are released when the unstable atom undergoes decay and emits charged particles. These rays have no effect on the atomic mass and number of the atom.
These rays only emitenergy whereas alpha and beta decay produces energy and newparticle. An excited nucleus emits energy in the case of gamma decay that is unlike the other two decays.
Therefore, there is no change in the atomicnumber in gamma decay.
Learn more about gamma decay here:
#SPJ2
Answer: It actually remains the same.
Explanation: Gamma radiation does not affect the atomic number or the atomic mass.
Related Questions
how many moles of ammonium sulfate can be made from the reaction of 30.0 mol nh3 with h2so4 according to the following equation.
17.The formation of steam above a pot of water is an example of condensation. evaporation. freezing. melting. 18.If you were to pour into a container materials in all three phases of matter, which phase would most quickly spread out to fill the container? Solid Liquid Gas Evaporated
A concentrated solution contains a large proportion of solute relative to the solvent. true or false
There is a correlation between algae height and the snout-to-vent length of a group of marine iguanas in the Galapagos; as algae height increases for a given island, so does iguana length. Why would the body size of this population of iguanas correlate with algae height?Differential reproduction of larger animals is favored when adequate nutrition is supplied by larger algae. Increased variation in animal size is favored when large plant species are present in a healthy ecosystem. Overproduction of smaller animals is favored when algae swards are short and vice versa when algae swards are long. Traits are exchanged between iguana and algae populations so that taller algae result in larger iguana populations
(2) Cl2(g) + 2NaF(aq)--> F2(g) + 2NaCl(aq)
(3) I2(s) + 2NaBr(aq)--> Br2(l) + 2NaI(aq)
(4) I2(s) + 2NaF(aq)--> F2(g) + 2NaI(aq)
Answers
The answer is: (1) Cl2(g) + 2NaBr(aq)-->Br2(l) + 2NaCl(aq).
In this chemical reaction chlorine change oxidation number from 0 to -1 (reduction) and bromine change oxidation number from -1 to 0 (oxidation).
Chlorine is stronger oxidation reagent than bromine.
In VIIA or group 17 (halogen elements) there are six elements: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At) and tennessin(Ts).
They have high electronegativity because they have seven valence electrons in their outermost energy level, so they can gain an electron to have the octet rule.
Going down in the group, element are weaker oxidazing reagent and less reactive.
Electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.
(2) oxalate (4) peroxide
Answers
B. Carbon dioxide
C. Water
D. Sodium hydroxide
Answers
Answer: D. Sodium hydroxide
Explanation:
A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.
Neutralization reaction is a type of double displacement reaction where an acid reacts with base to produce salt and water.
Thus on reacting hydrochloric acid and sodium carbonate we get sodium chloride, water and carbon dioxide as products.
is less than
is equal to
has no relationship to
Answers
Answer: is equal to
Explanation: According to the law of conservation of mass, mass can neither be created nor be destroyed. The mass has to be same on both sides of the reaction and to make this happen, the number of atoms of every element must be equal in reactants and products.
2 moles of hydrogen weigh=
1 mole of oxygen weigh = 32 g
Mass of reactants = 36 g
2 moles of water weigh=
Mass of products = 36 g
Thus mass of reactants = mass of products = 36 g
b. liquids.
c. malleable.
d. gases.
Answers
Answer : At room temperature, none of the metals are gases.
Explanation :
The properties of metals are :
Generally all the metals are solid at room temperature but with exception, the mercury is liquid at room temperature.
Generally all the metals are hard but with the exception, sodium and potassium are soft and easily cut with the knife.
The metals are malleable, ductile, lustrous in nature.
Metals are good conductor or heat and electricity.
Hence, At room temperature, none of the metals are gases.
Answer: Option (d) is the correct answer.
Explanation:
It is known that most of the metals are solid at room temperature but with a few exceptions like mercury is a liquid at room temperature and sodium is a soft metal as it can be cut with a knife.
Also, metals are malleable in nature that is, they can be shaped into thin sheets.
But metals are never gases. Hence, we can conclude that at room temperature, none of the metals are gases.
Answers
23 g ------------- 6.02 x 10²³ atoms
4.56 x 10⁻² g ----- ? atoms
atoms = 4.56 x 10⁻² x ( 6.02 x 10²³ ) / 23
atoms = 2.74 x 10²² / 23
= 1.19 x 10²¹ atoms
hope this helps!