This element is often used to block out dangerous radiation.a. lead
b. carbon-12
c. uranium-236
d. uranium-238
Answers
Related Questions
The elements that do not ordinarily form compounds area. elements in the carbon family. b. metals. c. halogens. d. noble gases.
In the reaction Mg (s) + 2HCl (aq) H2 (g) + MgCl2 (aq), how many grams of hydrogen gas will be produced from 125.0 milliliters of a 6.0 M HCl in an excess of Mg
Chemical changes do not form new compounds do not decompose the old compounds form new compounds change the appearance of the old compounds
What is Aqua Auras mineral family/class?
Answers
In my textbook it says that the maximum number of electrons that can fit in any given shell is given by 2n². Which would mean 2 electrons could fit in the first shell, 8 could fit in the second shell, 18 in the third shell, and 32 in the fourth shell. However, I was previously taught that the maximum number of electrons in the first orbit is 2, 8 in the second orbit, 8 in the third shell, 18 in the fourth orbit, 18 in the fifth orbit, 32 in the sixth orbit. I am fairly sure that orbits and shells are the same thing.
b. a substance that's composed of atoms
c. the force that holds together the elements in a compound
d. the attraction of two atoms that holds the atoms togethe?
Answers
Answer: -
A chemical bond is
C) the force that holds together the elements in a compound.
Explanation: -
A chemical bond results when there is a transfer of electrons from 1 element to another or there is a sharing of electrons between two element atoms.
Due to this compounds are formed.
Hence A chemical bond is
C) the force that holds together the elements in a compound.
the correct answer should be c.
Answers
Answer;
K+
Explanation;
-Noble gas configuration is the electron configuration equivalent to noble gases or group 8 elements. According to the octet rule an atom of an element gains or looses electrons to attain noble gases configuration which is the stable configuration, such that an atom has attained maximum number of electrons in the outermost energy level.
-For instance potassium is an alkali metal, consisting of one valence electron in the outermost energy level. For an atom of potassium to attain octet configuration or noble gases configuration it will have to loose one electron, thus forming a positively charged ion of potassium, K+.
I hope this helps. Let me know if anything is unclear.
Answers
(3) more mass and greater penetrating power
(4) more mass and less penetrating power
Answers
Answer is (1) - less mass and greater penetrating power.
Alpha particle is a ₂⁴He nucleus while beta particles are electrons. Hence, the mass of alpha particle is greater than the mass of beta particle. But, the penetrating power is higher in beta particle than alpha particle. Alpha particles can be blocked by few papers but beta particles can go through those papers.
Answer: A beta particle has less mass and greater penetrating power.
Explanation:
Penetrating power is the power with which a particle travels or pass through a substance.
Since, it is known that mass of an alpha particle () is more than the mass of a beta particle (
). So, a particle that holds less mass can move easily from one place to another.
Therefore, beta particle can move faster as it has only one electron as compared to 2 protons of an alpha particle. Hence, interaction of beta particles is less with the atoms or materials through which it passes.
Therefore, we can conclude that compared to the mass and the penetrating power of an alpha particle, a beta particle has less mass and greater penetrating power.
Answers
ng down on the periodic table, and the groups are the rows going across
Groups are up to down. These groups have the same number of outer shell electrons. There are 12 groups.