Chemistry Flashcards

Question

Actions that change physical properties:

Answer 1

Heating Cooling Dissolving Melting Freezing Boiling bending.

Answer 2

Alters the composition of the original matter. The atoms in compounds are rearranged to make new and different compounds

Answer 3

A characteristic of matter that can be observed as it changes to a different type of matter.

Answer 4

Flammability: How easily something will burn or ignite, is a chemical property because you can’t tel just by looking at something how easily it will burn. heat of combustion: This chemical property is the amount of energy that is released as heat when a substance is burned Toxicity: How much a substance can damage an animal, plant, cell, organ, or other organism ability to oxidize (Oxidation) : Rusting Reactivity: The ability of matter to react chemically with other substances

Answer 5

- Bubbling (a gas is produced) - Turns cloudy (a new solid is forming) - color change - spontaneous temperature change - odor change - burning (combustion).

Answer 6

changing the identity of the substance not

Answer 7

The attraction between oppositely charged particles

Answer 8

The charge that a nucleus exerts on its valence electrons (i.e. the ability of an atom to hold on to its own valence electrons). Affected by: # of protons, shielding, and distance Down a group: Constant due to shielding (adding protons, but also adding more shields that block the proton effect). Decreased coulombic attraction. Across a period: Increases due to adding protons without adding electron shells (shields). Increased coulombic attraction.

Answer 9

The distance between the center of the nucleus and the valence electron shell Affected by: Shielding and effective nuclear charge Down a group: Increases because of adding electron shells (atoms are getting bigger). Decreased coulombic attraction Across a period: Decreases because effective nuclear charge (adding protons) is increasing and pulling electrons closer to the nucleus. Increased coulombic attraction.

Answer 10

The ability of an atom to attract another atom’s valence electrons. Affected by: Shielding and effective nuclear charge Down a group: Decreases because shielding is increasing, making atoms larger and reducing coulombic attraction to electrons. Increases because effective nuclear charge is increasing which increases coulombic attraction to electrons.

Answer 11

The energy required to remove an electron from an atom Affected by: Shielding and effective nuclear charge Down a group: Decreases because of increased size and shielding which decreases coulombic attraction and makes it easier to remove electrons. Across a period: Increases because increasing effective nuclear charge increases coulombic attraction and makes it harder to remove electrons.

Answer 12

6.022 x 10^23 atoms

Answer 13

How much 1 mole of an atom weights, and is measured in grams

Answer 14

All matter is made of tiny particles that are constantly moving

Answer 15

Gas behaves the same way in random constant motion

Answer 16

1. Are translucent or transparent 2. Have low densities 3. Are highly compressible 4. Can fill any container 5. Are in constant random motion and collision

Answer 17

°C = K - 273

Answer 18

K = °C + 273

Answer 19

Absolute zero is only possible in theory

Answer 20

Pressure is a force per unit area that gases exert on a surface when they come into contact

Answer 21

760 mmHg (29.92 inches) of mercury, and 15 degrees Celsius