Help
Options
Question
In a periodic table, a set of properties repeats from
click to flip
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't know
Question
The atomic mass of an element is
Remaining cards (48)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Chemistry Chapter 5
Chapter 5 Review
| Question | Answer |
|---|---|
| In a periodic table, a set of properties repeats from | row to row |
| The atomic mass of an element is | the value that depends on the distribution of an elements isotopes in nature and the masses of those isotopes |
| Mendeleev organized elements in his periodic table in order of increasing | mass |
| One-twelfth the mass of a carbon-12 atom is used to define an | amu-12 atom |
| The usefulness of Mendeleev's periodic table was confirmed by | its ability to predict |
| The atomic mass unit (amu) is defined as one-twelfth the mass of an | carbon-12 atom |
| Atoms of the most reactive elements tend to have | valence electrons |
| Reactive elements, such as alkali metals and halogens, are found in nature only as | compounds |
| The unit for atomic mass is | amu |
| When Mendeleev organized elements in his periodic table in order of increasing mass, elements with similar properties were in the same | group |
| The standard on which the atomic mass unit is based is the mass of a | Carbon-12 |
| The two most reactive groups of elements in the periodic table are the alkali metals and the | halogens |
| Among the alkali metals, the tendency to react with other substances | increases from top to bottom within the group |
| The pattern of repeating properties of elements revealed in the periodic table is known as the | Periodic law |
| Hydrogen does not have the typical properties of a metal. However, hydrogen is located above Group 1A because it has one | Valence electron |
| Which halogen is most likely to react? | Bromine |
| To keep them from reacting, some highly reactive elements are stored in | argon |
| Mendeleev predicted that the undiscovered element he called eka-aluminum would have an ___________ melting point | low |
| Which of the following group 7A elements is the most reactive ? | Flouorine |
| Fertilizers usually contain two elements from group 5A, which are _______ and phosphorus | Nitrogen |
| Moving from left to right across a row of the periodic table, which of the following values increases by exactly one from element to element? | Mass number |
| Element 3, lithium, has one valence electron, and element 4, beryllium, has two valence electrons. Element 5, boron, has __________ valence electrons | 3 |
| Which statement is true about the metalloid silicon? | Silicon is a better conductor of an electric current than sulfur is |
| Although they are called _____ lights, they can contain any noble gas. | Neon |
| Mendeleev organized elements in his periodic table in order of increasing | Mass |
| Two highly reactive elements in Period 4 are the metal potassium and the | Nonmetal bromine |
| Compared with Group 2A elements, Group 6A elements have | more valence electrons |
| Boron is one block to the left of carbon in the periodic table. The atomic number of carbon is 6. The atomic number of boron is | 5 |
| At room temperature, none of the metals are | gases |
| Group 7A of the periodic table contains the | most reactive nonmetals |
| The elements Cesium (Cs), Barium (Ba), and Lutetium (Lu) appear from left to right in Period 6 in the Periodic Table. Of these elements, _____ is the most reactive. | Cesium (Cs) |
| A member of the Boron family has three valence electrons, while a member of the nitrogen family has | 5 |
| Elements can be classified as metals, nonmetals, and | metalloids |
| Which element is found in nature only in compounds? | Sodium |
| Which of these Group 1A elements is the most reactive? | Cs(Cesium) |
| One way to demonstrate reactivity among the alkaline earth metals, Group 2A, is to observe what happens when they are placed in ____ | water |
| Which of the following gases emit color when an electric current is applied? | Helium and neon |
| The tendency of an element to react chemically is closely related to | the number of valence electrons in atoms of the elements |
| Which element is found in most of the compound in your body except for water? | carbon |
| From left to right across a period in the periodic table, elements become less ______ and more _______ | metallic/nonmetallic |
| Metals that grow dull when exposed to air are more _____ than metals that reman shiny. | Reactive |
| Mendeleev gave the name eka-aluminum to a (an) | Unknown element he predicted would have properties similar to those of aluminum |
| In general, a _____ metal will be more reactive than an alkaline earth metal in the same period. | Alkali |
| Which list of elements contains only metals? | sodium,chromium, copper |
| To determine the atomic mass of an element, you would take a _______ average of the isotopes that make up that element. | Weighted |
| Which general statement does NOT apply to metals? | Most metals are brittle |
| Mendeleev's periodic table was useful because it enabled scientists to predict properties of unknown | elements |
| As you move from left to right across a period, the number of valence electrons | increases |
| Which statement is NOT true about the elements fluorine, chlorine, and iodine? | They are similar to noble gases. |
Created by:
Deja Warren
Popular Chemistry sets