Answer the following question given this paragraph: Because the nuclei of each H atom contain protons, the electrons in the bond are attracted to the nuclei (opposite charges attract). But because the two atoms involved in the covalent bond are both H atoms, each nucleus attracts the electrons by the same amount. Thus the electron pair is equally shared by the two atoms. The equal sharing of electrons in a covalent bond is called a nonpolar covalent bond. Now consider the HF molecule:. Q: Because the nuclei of each h atom contain protons, the electrons in the bond are attracted to the nuclei (opposite charges attract). but because the two atoms involved in the covalent bond are both h atoms, each nucleus attracts the electrons by the same amount. thus the electron pair is equally shared by these? Choices: - four atoms - one atom - nine atoms - two atoms A:
two atoms
(Question)
Answer the following question given this paragraph: Our Sun is a star , a sphere of plasma held together by gravity. It is an ordinary star that is extraordinarily important. The Sun provides light and heat to our planet. This star supports almost all life on Earth. Q: What is a buildup of electric charges on objects? Choices: - wattage - potential - conduction - static A:
(Answer)
static
Ques: Answer the following question given this paragraph: Strong bases completely dissociate in water, releasing all hydroxide anions into the solution. The most common strong bases are soluble metal hydroxides. Weak bases partially deprotonate water to form small amounts of hydroxide and the protonated base. Q: What kind of bases completely dissociate in water, releasing all hydroxide anions into the solution? Choices: - unusual - weak - whole - strong A:
Ans: strong
(Q).
Answer the following question given this paragraph: Image copyright Vasiliy Koval, 2013, modified by CK-12 Foundation. The skull has fixed joints that do not allow any movement . Used under license from Shutterstock. com. Q: What kind of joints does the skull have that do not allow any movement? Choices: - fixed particles - fixed cells - fixed plates - fixed joints A:
(A).
fixed joints
Ques:Answer the following question given this paragraph: The energy produced by a reactor fueled with enriched uranium results from the fission of uranium as well as from the fission of plutonium produced as the reactor operates. As discussed previously, the plutonium forms from the combination of neutrons and the uranium in the fuel. In any nuclear reactor, only about 0.1% of the mass of the fuel is converted into energy. The other 99.9% remains in the fuel rods as fission products and unused fuel. All of the fission products absorb neutrons, and after a period of several months to a few years, depending on the reactor, the fission products must be removed by changing the fuel rods. Otherwise, the concentration of these fission products would increase and absorb more neutrons until the reactor could no longer operate. Spent fuel rods contain a variety of products, consisting of unstable nuclei ranging in atomic number from 25 to 60, some transuranium elements, including plutonium and americium, and unreacted uranium isotopes. The unstable nuclei and the transuranium isotopes give the spent fuel a dangerously high level of radioactivity. The long-lived isotopes require thousands of years to decay to a safe level. The ultimate fate of the nuclear reactor as a significant source of energy in the United States probably rests on whether or not a politically and scientifically satisfactory technique for processing and storing the components of spent fuel rods can be developed. Q: How long do the long-lived isotopes require to decay to a safe level in a nuclear reactor? Choices: - tens of years - millions of years - hundreds of years - thousands of years A:

Ans:thousands of years
Answer the following question given this paragraph: The forelimbs of all mammals have the same basic bone structure. Q: Which part of all mammals have the same basic bone structure? Choices: - ankles - knees - necks - forelimbs A:
forelimbs