A&P - Ch. 2.3 - 2.4: Chemistry Comes Alive - DSMs

Which atom is most likely to participate in an ionic bond? An atom with 2 electrons. An atom with 10 electrons. An atom with 26 electrons. An atom with 11 electrons.

An atom with 11 electrons.

Which of the following is correctly matched? Blood is a colloid. Jell-O is a solution. Mineral water is a colloid. Blood is a suspension.

Blood is a suspension.

Match the following: Electrically charged particle from loss of an electron. Neutron Atom Molecule Cation Anion

Cation

Match the following: A type of bond that holds different parts of a single large molecule together into a three dimensional structure. Hydrogen bond. Polar covalent bond. Ionic bond. Nonpolar covalent bond.

Hydrogen bond.

Which type of bond exists between water molecules? Ionic bond. Polar covalent bond. Hydrogen bond. Nonpolar covalent bond.

Hydrogen bond.

Which of the following is untrue concerning hydrogen bonds? Hydrogen bonding is responsible for the tendency of water molecules to cling together and form films, referred to as surface tension. Hydrogen bonds are one of the strongest bonds that bind atoms together. Hydrogen bonds contribute to the structure of DNA. Hydrogen bonds contribute to the structure of proteins.

Hydrogen bonds are one of the strongest bonds that bind atoms together.

Large numbers of Na+ and Cl- ions associate to form salt (NaCl) Crystals. This is an example of which bonding type? Polar covalent bonding Nonpolar covalent bonding Ionic bonding Hydrogen bonding

Ionic bonding

Which of the following statements concerning molecules and compounds is true? If two or more atoms of the same element combine, the resulting substance is called a compound of that element. When two or more different kinds of atoms bind, they form a compound of a molecule. Just as an atom is the smallest particle of an element that still has the properties of the element, a molecule is the smallest particle of a compound that still has the specific characteristics of the compound. The properties of compounds are usually very similar to those of the atoms they contain.

Just as an atom is the smallest particle of an element that still has the properties of the element, a molecule is the smallest particle of a compound that still has the specific characteristics of the compound.

Match the following: Smallest particle of a compound that still retains its properties. Molecule. Cation. Anion. Neutron. Atom.

Molecule.

Match the following: A bond in which electrons are equally shared. Polar covalent bond. Nonpolar covalent bond. Ionic bond. Hydrogen bond.

Nonpolar covalent bond.

Which of the following is true of concentrations of solutions? Equal grams of a molecule are used to calculate a molar solution. One mole of any substance always contains exactly the same number of solute particles. That is 6.02 x 10^23. This is called Avogadro's number. The beauty of using the mole as the basis of preparing solutions is it allows for one way to calculate concentration. Solutions refer to the to the solvent percentage, and unless otherwise noted, water is assumed to be the solute.

One mole of any substance always contains exactly the same number of solute particles. That is 6.02 x 10^23. This is called Avogadro's number.

Match the following: A bond in which electrons are shared unequally. Ionic bond. Nonpolar covalent bond. Polar covalent bond. Hydrogen bond.

Polar covalent bond.

Which of the following is true regarding solutions? Solutions are homogeneous mixtures of components that may be gases, liquids, or solids. A solution cannot be a solid. In a true solution, the amount of solvent and solutes is the same. In a solution, the solvent is present in the least quantity.

Solutions are homogeneous mixtures of components that may be gases, liquids, or solids.

Which statement is true? Solutions, also called emulsions, are heterogeneous mixtures, which means that their composition is dissimilar in different areas of the mixture. Colloids are heterogeneous mixtures with large, often visible solutes that tend to settle out. Solutions, colloids, and suspensions are all present within a human being. Suspensions are homogeneous mixtures of components that may be gases, liquids, or solids. Homogeneous means that the mixture has exactly the same composition or makeup throughout.

Solutions, colloids, and suspensions are all present within a human being.

Which of the following statements about a dipole, or a polar molecule, is incorrect? They orient themselves towards other dipole molecules. They play essential roles in chemical reactions in body cells. An example of a dipole molecule is water. The dipole molecules are electrically balanced.

The dipole molecules are electrically balanced.

Which of the following is incorrect regarding true solutions? True solutions contain gases, liquids, or solids dissolved in water. The solutes of true solutions are very small, usually in the form of individual atoms and molecules. If a beam of light is passed through a true solution, you will not see the path of light. True solutions are usually opaque due to the number of solutes dissolved in the solution.

True solutions are usually opaque due to the number of solutes dissolved in the solution.

In blood, which of the following least fits the definition of a solute? Potassium Sodium Calcium Water

Water

Which of the following does not represent an accurate hierarchy in the natural combination of matter? When two or more similar kinds of atoms bind, they form an isotope. Protons, neutrons, and electrons comprise atoms, which chemically bond with other atoms to form molecules. A molecule contains two or more atoms. Mixtures are substances composed of two or more components physically blended.

When two or more similar kinds of atoms bind, they form an isotope.

An ionic bond is ____________. a chemical bond where two atoms equally share the electrons in the outer shell. a chemical bond between atoms formed by the transfer of one or more electrons from one atom to another. formed when electrons shared between two or more atoms are unequally shared. formed when a hydrogen atom already covalently linked to one electronegative atom attracts to another electron-hungry atom to form a "bridge".

a chemical bond between atoms forms by the transfer of one or more electrons from one atom to another.

Chemical bonds _________________. are energy relationships between the electrons of the reacting atoms. take a long time to break. are physical structures that hold atoms together. are energy relationships between the protons of the reacting atoms.

are energy relationships between the electrons of the reacting atoms.

Ionic bonds form between two atoms when _________________. the two atoms share electrons. one atom donates an electron to the other atom. protons are exchanged. neutrons are exchanged.

one atom donates an electron to the other atom.

The outermost energy level of an atom is known as its _______________. orbital model. electron shell. energy shell. valence shell.

valence shell.