Q: What is an example of a metaloid element? Read this paragraph and choose the correct option from the provided answers: Most metalloids have some physical properties of metals and some physical properties of nonmetals. They fall between metals and nonmetals in their ability to conduct heat and electricity. They are shiny like metals but brittle like nonmetals. All exist as solids at room temperature. Choices: - argon - chlorine - fluorine - silicon A:
silicon

Q: A redox reaction rearranges what subatomic particles? Read this paragraph and choose the correct option from the provided answers: A combination reaction makes a new substance from more than one reactant; a redox reaction rearranges electrons. Not all combination reactions are redox reactions, and not all redox reactions are combination reactions. Choices: - neutrons - water molecules - protons - electrons A:
electrons

Q: Q: Nonvascular plants lack vascular tissue and what? Read this paragraph and choose the correct option from the provided answers: Nonvascular plants lack seeds and vascular tissue. Choices: - cytoplasm - chlorophyll - cells - seeds A:
A: seeds

Question: Q: What facilitates the diffusion of ions across a membrane? Read this paragraph and choose the correct option from the provided answers: Choices: - photon channels - ionic bonds - passive transport - ion channels A:
Answer: ion channels

*Question*
Q: A lewis acid is a substance that accepts a pair of electrons to form what? Read this paragraph and choose the correct option from the provided answers: Gilbert Lewis (1875-1946) proposed a third theory of acids and bases that is even more general than either the Arrhenius or Brnsted-Lowry theories. A Lewis acid is a substance that accepts a pair of electrons to form a covalent bond. A Lewis base is a substance that donates a pair of electrons to form a covalent bond. So, a Lewis acid-base reaction is represented by the transfer of a pair of electrons from a base to an acid. A hydrogen ion, which lacks any electrons, accepts a pair of electrons. It is an acid under both the Brnsted-Lowry and Lewis definitions. Ammonia consists of a nitrogen atom as the central atom with a lone pair of electrons. The reaction between ammonia and the hydrogen ion can be depicted as shown in the Figure below . Choices: - accretion bond - functionality bond - ambivalent bond - covalent bond A:
**Answer**
covalent bond

(Question)
Q: What is defined as a loss of hydrogen atoms? Read this paragraph and choose the correct option from the provided answers: Oxidation is also defined as a loss of hydrogen atoms. In the following equation, ethanol is oxidized to acetaldehyde by the loss of two hydrogen atoms:. Choices: - Reduction - evaporation - conduction - oxidation A:
(Answer)
oxidation