Which of the following chemical elements corresponds to the symbol Cu?

Which of the following chemical elements corresponds to the symbol Cu? A) copper B) gold C) lead D) silver E) none of the above

Water in a swimming pool contains dissolved sodium chloride and many other salts. Which of the following describes water in a swimming pool? A) compound B) element C) heterogeneous mixture D) homogeneous mixture E) none of the above

Which of the following chemical elements corresponds to the symbol Hg? A) antimony B) mercury C) silver D) tin E) none of the above

42) Which of the following chemical symbols corresponds to bromine? A) Ba B) Be C) Bo D) Br E) none of the above

Which of the following chemical symbols corresponds to germanium? A) Au B) Ga C) Ge D) Sb E) none of the above

Ammonium sulfate, (NH 4 ) 2 SO 4, is in fertilizer and replenishes nitrogen to the soil. What is the total number of atoms in the chemical formula? A) 13 B) 14 C) 15 D) 20 E) none of the above

Which of the following chemical symbols corresponds to krypton? A) K B) Kr C) Kn D) P E) none of the above

What is the term for the value that indicates the number of protons for an atom of a given element? A) atomic notation B) atomic number C) atomic mass D) mass number E) none of the above

What is the term for two atoms of the same element that differ by the number of neutrons in the nucleus? A) atomic mass units B) isotopes C) nucleons D) photons E) none of the above

Refer to a periodic table and predict which of the following elements is a gas at 25 C and one atmosphere pressure. A) Na B) Nb C) Nd D) Ne E) Np

What is the term for the value that indicates the total number of protons and neutrons in an atom of a given element? A) atomic notation B) atomic number C) atomic mass D) mass number E) none of the above

Using atomic notation, indicate the isotope having 11 p+, 12 n 0, and 11 e-. 12 A) Na 11 23 B) Na 11 23 C) Na 12 12 D) Mg 11 23 E) Mg 12

What is the negatively charged subatomic particle having a negligible mass? A) electron B) neutron C) proton D) quark E) none of the above

Using atomic notation, indicate the isotope having 25 p+, 30 n 0, and 25 e-. 30 A) Mn 25 55 B) Zn 30 55 C) Mn 30 30 D) Zn 25 55 E) Mn 25

How many neutrons are in the nucleus of an atom of bromine-79? A) 35 B) 79 C) 44 D) 114 E) 179

How many neutrons are in the nucleus of an atom of A) 50 B) 78 C) 118 D) 68 E) 168 118 50 Sn?

How many neutrons are in the nucleus of an atom of 118 50 Sn? A) 50 B) 78 C) 118 D) 68 E) 168

Which of the following wavelengths has the lowest frequency? A) 440 nm B) 470 nm C) 540 nm D) 650 nm E) All wavelengths have the same frequency.

Which of the following colors of light has the shortest wavelength? A) violet B) green C) yellow D) red E) All colors have the same wavelength.

Which of the following wavelengths has the lowest velocity? A) 440 nm B) 470 nm C) 540 nm D) 650 nm E) All wavelengths have the same velocity.

How many energy sublevels exist within in the 2 nd principal energy level? A) 1 B) 2 C) 3 D) 4 E) none of the above

What is the maximum number of electrons that can occupy an s energy sublevel? A) 2 B) 6 C) 10 D) 14 E) none of the above

Which of the following energy-level changes for an electron is most energetic? A) 2 1 B) 3 2 C) 4 3 D) 5 4 E) All changes have the same energy

What is the maximum number of electrons that can occupy a d energy sublevel? A) 2 B) 6 C) 10 D) 14 E) none of the above

Which electron sublevel follows the 4s sublevel according to increasing energy? A) 3p B) 3d C) 4p D) 4d E) 5s

What is the maximum number of electrons that can occupy a p energy sublevel? A) 2 B) 6 C) 10 D) 14 E) none of the above

What is the electron configuration for an atom of fluorine? A) 1s 2 2s 2 2p 3 B) 1s 2 2s 2 2p 5 C) 1s 2 2s 2 2p 6 3s 1 D) 1s 2 2s 2 2p 6 3s 2 3p 5 E) none of the above

Which electron sublevel follows the 3d sublevel according to increasing energy? A) 3s B) 3p C) 4s D) 4p E) 4d

What is the electron configuration for an atom of silicon? A) 1s 2 2s 2 2p 4 B) 1s 2 2s 2 2p 6 3s 2 C) 1s 2 2s 2 2p 6 3s 2 3p 2 D) 1s 2 2s 2 2p 6 3s 2 3p 4 D) 1s 2 2s 2 2p 6 3s 2 3p 6

Which element has the following electron configuration: 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 6 5s 2? A) Ca B) Rb C) Sn D) Sr E) Ge

Which element has the following electron configuration: 1s 2 2s 2 2p 6 3s 2? A) Ca B) Mg C) Na D) Si E) Sn

Which of the following orbitals has a "dumbbell" shape? A) 4s B) 4p x C) 4d xy D) all of the above E) none of the above

Which of the following orbitals has a spherical shape? A) 4s B) 4p x C) 4d xy D) all of the above E) none of the above

What is the maximum number of electrons in a 4s orbital? A) 1 B) 2 C) 4 D) 6 E) 8

Which of the following orbitals is the largest in size? A) 1s B) 2s C) 3s D) 4s E) All s orbitals are the same size.

How many valence electrons are in a fluorine atom and a fluoride ion? A) 1 and 8, respectively B) 7 and 8, respectively C) 8 and 7, respectively D) 9 and 10, respectively E) none of the above

What is the maximum number of electrons in a 4d orbital? A) 1 B) 2 C) 5 D) 10 E) 40

Draw the electron dot formula for water, H 2 O. How many pairs of nonbonding electrons are in a water molecule? A) 1 B) 2 C) 3 D) 4 E) 5

Draw the electron dot formula for hydrogen chloride, HCl. How many pairs of nonbonding electrons are in a hydrogen chloride molecule? A) 1 B) 2 C) 3 D) 4 E) 5

Draw the electron dot formula for methane, CH 4. How many pairs of nonbonding electrons are in a methane molecule? A) 0 B) 1 C) 4 D) 6 E) 8

Draw the electron dot formula for ammonia, NH 3. How many pairs of nonbonding electrons are in an ammonia molecule? A) 1 B) 2 C) 3 D) 6 E) 5

Which of the following shows a general increasing trend for electronegativity in the periodic table? A) down a group of metals B) down a group of nonmetals C) across a series of metals from right to left D) across a series of nonmetals from right to left E) none of the above

Draw the structural formula for hydrogen cyanide, HCN, and state the type of bonds in a hydrogen cyanide molecule. A) 2 single bonds B) 2 double bonds C) 1 single bond and 1 double bond D) 1 single bond and 1 triple bond E) 2 single bond and 2 triple bond

According to the general trends in the periodic table, which of the following is the most electronegative element? A) H B) F C) Cl D) Br E) I

Draw the structural formula for ethylene, C 2 H 4, and state the type of bonds in an ethylene molecule. A) 5 single bonds B) 4 single bonds and 1 double bond C) 4 single bonds and 1 triple bond D) 1 single bond and 4 double bonds E) 2 single bond and 4 double bonds