CHAPTER 2 Atoms All about Atoms and What's Inside Them

How many protons are in a sodium (Na) atom? 12 10 24 13 11

11

Among the various forms of light making up the electromagnetic spectrum, which light has the highest frequency?

gamma rays etc

Once the electron has moved to a ? energy level, it can return to the ? state. When it does, the amount of energy it used to move to the higher energy level is ? , often in the form of radiant energy. Radiant energy is also known as ?

higher, ground, released, light

At the time of this writing, there are ? known different types of atoms, and scientists call each type of atom an ? . We use the term ?generically, the way we would use the word car. We use the word ? to describe the ? types of atoms, the way we would use Honda or Ford to describe a specific type of car. Just as we can say, "That car is a Honda or this car is a Ford," we refer to "an atom of this element" or "an atom of that element." We humans have given each element a unique name and a corresponding one-, two-, or three-letter atomic ? . You can find a table of element names and symbols ? the front cover of this book.

114, element, atom, element, specific, symbol, inside

How many neutrons does a silver isotope contain that has a mass number 109? Just type in integer number for your answer.

62

A neutral atom of gold (Au) will contain how many electrons? 79 179 15 31 47

79

How many protons, electrons and neutrons are in an atom of fluorine (F)? 9 protons, 9 electrons, 10 neutrons 17 protons, 17 electrons, 2 neutrons 9 protons, 10 electrons, 9 neutrons 10 protons, 9 electrons, 10 neutrons

9 protons, 9 electrons, 10 neutrons

Which statement is irrelevant to the content of the Green Beat at the end of chapter two? Incandescent bulbs are no longer in production in the US. Incandescent bulbs typically run at about 10% efficiency, meaning that most of the energy put into them is lost as heat. Incandescents can still be sold, but they must abide by strict new standards that older-generation incandescents could not meet. The function of a white powdery coating inside the glass of a CFL (compact fluorescent light) bulb is to convert the ultraviolet light emitted by the mercury to visible light. The white powdery coating inside of those tightly curving glass tubes of a CFL bulb tends to crack. And when it cracks, ultraviolet light escapes. A lampshade helps to block harmful ultraviolet rays from your CFL bulb.

A lampshade helps to block harmful ultraviolet rays from your CFL bulb.

What is the name and the element symbol for the element that has the atomic number 17? oxygen (O) fluorine (F) Chlorine (Cl) Sulfur (S) Carbon (C)

Chlorine (Cl)

Which statement is false? A nucleus of an atom takes up only a very very small portion of the atom because the protons and neutrons in the nucleus are packed together tightly. The plural of the word nucleus is nuclei. In general, the number of neutrons in a given atom is not obvious. no Every atom of hydrogen contains no neutrons.

Every atom of hydrogen contains no neutrons.

Which type of electromagnetic radiation is associated with heat? X-rays Gamma rays Visible light Infrared light UV light

Infrared light

Which statement is false? The atom's mass number is the total number of neutrons plus protons in the atom's nucleus. The number of neutrons in one atom of a given element can be different from the number of neutrons in another atom of the same element. The number of protons determines the identify of an element. Isotopes are atoms that have the same number of electrons and the same number of protons, but different numbers of nucleus.

Isotopes are atoms that have the same number of electrons and the same number of protons, but different numbers of nucleus.

Which element is in group 18? Kr B N O Cl

Kr

Isotopes of an element differ in the number of __________ that they contain. Electrons Neutrons Protons Atoms photons

Neutrons

Isotopes of which element were used to determine the source of the marble used in the Parthenon? Oxygen Carbon Chlorine Calcium

Oxygen

Write the name and symbol for the element with atomic number 51 is: Sb, antimony Pd, palladium Ce, cerium Mg, magnesium

Sb, antimony

What determines how far from the ground state an electron will jump when energy is added to an atom? The size of the atom The number of electrons in the atom The amount of energy added to the atom The number of atoms in a certain sample

The amount of energy added to the atom

Which electrons are involved in chemical reactions? All of the electrons are involved in chemical reactions. Electrons are not involved in chemical reactions. The electrons closest to the nucleus are involved in chemical reactions. The electrons furthest from the nucleus are involved in chemical reactions. The electrons inside the nucleus are involved in chemical reactions.

The electrons furthest from the nucleus are involved in chemical reactions.

Which statement is false? The mass of a proton is roughly the same as the mass of an electron. The mass of a proton is roughly the same as the mass of a neutron. Electrons occupy the space around the nucleus in the atom. The nucleus of an atom takes up a very small portion of the space in the atom.

The mass of a proton is roughly the same as the mass of an electron.

Which statement is false? Each electron has one negative charge, and negative charges repel one another. The energy of each successive level in the atom increases as we move away from the nucleus. The number of electrons for each energy level gets smaller and smaller as we move farther from the nucleus. The first energy level in the atom can hold only two electrons.

The number of electrons for each energy level gets smaller and smaller as we move farther from the nucleus.