Question | Answer |
What part of an atom has a positive charge? | proton |
What part of an atom has no charge? | neutron |
What part of an atom has a negative charge? | electron |
What does the atomic number tell us? | number of protons in the nucleus |
What does the atomic mass tell us? | the total number of protons and neutrons, in the nucleus of an atom, combined |
In a neutral atom, the number of protons is equal to the number of... | electrons |
What is the atomic mass unit (AMU) of a proton? | 1 |
What is the atomic mass unit (AMU) of an electron? | 1/1800 |
What is the atomic mass unit (AMU) of a neutron? | 1 |
How can you find the number of neutrons in an element? | atomic mass - atomic number |
What is the building block of all matter? | atoms |
An atom with a charge is called an... | ion |
An atom more electrons is an ion with what type of electrical charge? | negative |
An atom more protons is an ion with what type of electrical charge? | positive |
How many electrons can fit into an atom's first energy level? | 2 |
How many electrons can fit into an atom's second energy level? | 8 |
How many electrons can fit into an atom's third energy level? | 18 |
When bonding, how many electrons does each element want in it's outer energy level? | 8 |
The nucleus of an atom has what charge? | positive |
What is the smallest particle in an atom? | the electron |
The Periodic Table is arranged by increasing... | atomic number |
Is water (H20) a compound or an element? | compound (two or more elements are CHEMICALLY combined) |
Is oxygen (O) a compound or an element? | an element (made of 1 KIND of atom) |
If Lithium (Li) has an atomic number of 3 and an atomic mass of 7, how many electrons does it have? | 3 (atomic # = # of protons and electrons in a NEUTRAL element) |
If Lithium (Li) has an atomic number of 3 and an atomic mass of 7, how many neutrons does it have? | 4 (atomic mass - atomic # = neutrons) |
Why are atoms electrically neutral? | # of protons = # of electrons |
Are all three parts of an atom the same size? | no (protons and neutrons have a mass of 1, electrons have a mass of 1/1800 because they are too small to count) |
Why is CO2 a compound? | Two or more elements are CHEMICALLY combined. |