Q: Q: What are chemical bonds between atoms of nonmetals that share valence electrons called? Read this paragraph and choose the correct option from the provided answers: Covalent bonds are chemical bonds between atoms of nonmetals that share valence electrons. In some covalent bonds, electrons are not shared equally between the two atoms. These are called polar covalent bonds. The Figure below shows the polar bonds in a water molecule (H 2 O). The oxygen atom attracts the shared electrons more strongly than the hydrogen atoms do because the nucleus of the oxygen atom has more positively charged protons. As a result, the oxygen atom becomes slightly negative in charge, and the hydrogen atoms become slightly positive in charge. For another example of polar bonds, see the video at this URL: http://www. youtube. com/watch?v=1lnjg81daBs. Choices: - electron bonds - ionic bonds - gravitational bonds - covalent bonds A:
A: covalent bonds

Q: Q: When electrons are shared between two atoms, they make a bond called a what? Read this paragraph and choose the correct option from the provided answers: Ionic bonding typically occurs when it is easy for one atom to lose one or more electrons and another atom to gain one or more electrons. However, some atoms won't give up or gain electrons easily. Yet they still participate in compound formation. How? There is another mechanism for obtaining a complete valence shell: sharing electrons. When electrons are shared between two atoms, they make a bond called a covalent bond. Let us illustrate a covalent bond by using H atoms, with the understanding that H atoms need only two electrons to fill the 1s subshell. Each H atom starts with a single electron in its valence shell:. Choices: - metallic bond - ionic bond - hydrogen bond - covalent bond A:
A: covalent bond

Q: Q: What do you call the sudden flow of mud down a slope because of gravity? Read this paragraph and choose the correct option from the provided answers: A mudslide is the sudden flow of mud down a slope because of gravity. Mudslides occur where the soil is mostly clay. Like landslides, mudslides usually occur when the soil is wet. Wet clay forms very slippery mud that slides easily. You can see an example of a mudslide in Figure below . Choices: - rockflow - typhoon - mountainside - mudslide A:
A: mudslide

Q: Q: How many limbs to birds have? Read this paragraph and choose the correct option from the provided answers: Birds are four-limbed, endothermic vertebrates with wings and feathers. They produce amniotic eggs and are the most numerous class of vertebrates. Choices: - five - six - ten - four A:
A: four