ABCTE-Biology Basics questions with 100% correct answers 2024

ABCTE-Biology Basics electrons can be anywhere in a cloud-like region around the nucleus of an atom. This "cloud" is a visual model that symbolizes what - correct answer where electrons are likely to be found An electron's movement is related to what - correct answer its energy level, or the specific amount of energy it has Electrons of different energy levels are likely to be what - correct answer found in different places lower energy electrons are where - correct answer close to the nucleus higher energy electrons are where - correct answer farther away from the nucleus. An atom's valence electrons are what - correct answer those that have the highest energy level and are held most loosely and farthest from the nucleus. The number of valence electrons in an atom of an element determines what - correct answer the chemical properties of that element, including the ways in which the atom can bond with other atoms. Atoms with five, six, or seven valence electrons become more stable when what happens - correct answer when this number increases to eight. So when they react, they tend to gain electrons from other atom(s) , atoms with one, two, or three valence electrons can do what - correct answer lose electrons to other atom(s) so they have eight in their previous level, and become more stable. Atoms become more stable by what - correct answer having their outermost electron cloud either completely full (often eight) or empty of electrons When these two types of atoms combine, electrons are transferred from one atom to another, making the atoms more stable and able to bond tightly together in what - correct answer an ionic bond. The other type of chemical bond occurs when it is easier for two or more atoms to share electrons and is called what. - correct answer a covalent bond. A covalent bond is formed when what happens - correct answer when the total number of shared valence electrons completely fills or empties the outermost electron level. Covalent bonds usually form between what - correct answer atoms of non-metals, ionic bonds usually form between what - correct answer a metal and a non-metal. Covalent bonds are mostly responsible for what - correct answer holding hydrogen and oxygen atoms together in a water molecule In covalent bonding, the atoms sometimes have a partial electrical charge (positive or negative), because of what - correct answer the unequal sharing of the electrons In covalent bonding, Often one of the atoms will draw an unequal share of the electrons around it leaving the other atom with what - correct answer a smaller amount of electrons The atom that draws the most electrons also receives what - correct answer their negative charge giving that part of the atom a partial negative charge In covalent bonding, The other atom has fewer electrons around it, so it has what - correct answer a slight positive charge provided by the protons in the nucleus, and absence of electrons in the orbitals. This type of compound is called a polar compound because of what - correct answer because it has a slight positive and a slight negative region.