Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
16 Cards in this Set
- Front
- Back
- 3rd side (hint)
|
When we consider the mass of an atom, why do we ignore the weight of the electron? |
The mass of an electron is so small it can be ignored when calculating the mass of an atom. |
Think of the size |
|
|
Why are atoms with complete outer shells not likely to bond with other atoms? |
Bonding with an atom with a full valence shell, could potentially produce a more unstable atom. |
|
|
|
Why is a hydrogen atom bonded to another hydrogen atom more stable than a hydrogen atom on its own? |
Atoms are most stable when their valence shell is full. Because the first shell holds a maximum of two electrons, a hydrogen bonded covalently to another hydrogen will fill its valence shell as each atom shares its single valence electron, forming more stable atoms within the molecule. |
|
|
|
Why are hydrogen bonds so much weaker than covalent or ionic bonds? |
Covalent and ionic bonding involves the sharing of or transfer of electrons, respectively. Hydrogen bonding involves the attraction between hydrogen and another molecule as a result of weak opposite charges, which is a much weaker attraction.🤓 |
|
|
|
The atomic number of carbon is 6. Its nucleus must contain: |
6 neutrons and 6 protons. |
|
|
|
The second orbital shell of an atom can hold____electrons. |
8 |
|
|
|
A covalent bond is formed when.. |
two atoms share electrons. |
|
|
|
Which of the following phenomena is most likely due to the height cohesiveness of water.. |
A) lakes and rivers freeze from the top down, not the bottom up. B)The fishing spider can walk across the surface of liquid water. C) adding salt to snow makes it melt. D)all of the above are due to the cohesiveness of water. |
B) The fishing spider🕸️ |
|
|
Water can absorb and store a large amount of heat while increasing only a few degrees in temperature. Why? |
The heat must first be used to break the hydrogen bonds rather than raise the temperature. |
|
|
|
A chemical compound that releases H+ into a solution is called.. |
A Buffer |
|
|
|
Ocean acidification results from.. |
Absorption of carbon dioxide by chemicals in the ocean.🌊 |
|
|
|
What are the three ways that atoms can be bound together? |
Covalent bond, ionic bond, hydrogen bond. |
|
|
|
Name the bond that forms when atoms share electrons. |
Covalent bonds |
|
|
|
Name the bond that transfers electrons, making the two oppositely charged attracted to each other. |
Ionic bonds |
|
|
|
Which bond is the weakest? And Why? |
-Hydrogen bonds -The attraction between a hydrogen atom of one molecule and another atom of another molecule with the *slight negative charge* makes it weak. |
|
|
|
Name the important characteristics hydrogen bonds between water molecules, give water that make it possible to have life on Earth. |
-Cohesiveness -Reduced density as a solid -The ability to resist temperature changes -Broad effectiveness of a solvent for Ionic and polar substances. |
|
