Q: 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:
A: two atoms

Q: Answer the following question given this paragraph: Gravity keeps the Moon orbiting Earth. Gravity keeps the planets orbiting the Sun. Q: What keeps the moon orbiting earth? Choices: - Coriolis effect - the Sun - axial tilt - gravity A:
A: gravity

Q: Answer the following question given this paragraph: All matter is composed of tiny indivisible particles called atoms. All atoms of an element are identical in mass and chemical properties, whereas atoms of different elements differ in mass and fundamental chemical properties. A chemical compound is a substance that always contains the same atoms in the same ratio. In chemical reactions, atoms from one or more compounds or elements redistribute or rearrange in relation to other atoms to form one or more new compounds. Atoms themselves do not undergo a change of identity in chemical reactions. This last hypothesis suggested that the alchemists' goal of transmuting other elements to gold was impossible, at least through chemical reactions. We now know that Dalton's atomic theory is essentially correct, with four minor modifications:. Q: All matter is composed of tiny indivisible particles called atoms. all atoms of an element are identical in mass and this? Choices: - acid properties - liquid properties - electrical properties - chemical properties A:
A: chemical properties

Q: Answer the following question given this paragraph: Water is needed by all known forms of life. Q: What is needed by all known forms of life? Choices: - nitrogen - warmth - air - water A:
A: water