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;
10 Cards in this Set
- Front
- Back
|
An atom's nucleus is composed of ___________. |
Protons and neutrons |
|
|
The second electron shell is considered to be full when it contains _____ electrons. |
8 |
|
|
Most biological molecules are joined by ____________. |
covalent bonds |
|
|
What allows one atom to physically interact with a second atom? |
number of electrons in outermost cell |
|
|
A buffer, such as bicarbonate in the blood, _______. |
both accepts and releases hydrogen ions (H+) in response to changes in concentration in order to maintain a constant pH. |
|
|
The electrical attraction between positively and negatively charged ions forms a(n) __________. |
ionic bond |
|
|
The smallest units of matter that still retain the characteristics of an element are called ________. |
atoms |
|
|
What kind of bond holds the atoms within a single water molecule together? |
polar covalent |
|
|
A solution with neutral pH __________. |
Has equal amounts of H+ and OH- |
|
|
Imagine that you have been hired as a research scientist and your first task is to examine a newly discovered atom. The paperwork you are given states that its atomic number is 110. What does this mean? |
the atom contains 110 protons |
