Compare and contrast a solution and an alloy
which of these is not a physical property:
texture color viscosity flammability l... attraction
Explain why your choice above is not a physical property.
1. Everything around us is made of ___ Atoms ___________.
2. What three particles are atoms composed of:
Electron _, proton_, neutron___
3. The central part of the atom is made of protons and neutrons and is called the ____________________.
4. Electrons rapidly move around the nucleus in a region often called the _______________ _______________.
5. The radius of the electron cloud is about _______________ times larger than the radius of the nucleus.
6. The mass of a _______________ and _______________ are about the same (1.67 X 10-27 kg)
7. An electron’s mass is much ___________(smaller or bigger) than a proton or neutron.
8. Everything around you is made of _______________, which are _______________ in motion.
9. _______________ have a positive electrical charge. _______________ have a negative electrical charge. _______________ have no electrical charge.
10. What net charge will an atom with 3 protons and 3 electrons have?
11. Which two particles have an attractive force between them?
12. What is an ion?
13. An atom with more protons than electrons has a net _______________ charge.
14. Elements are atoms that have the same number of _______________.
15. An atom with 3 protons is the element _______________.
Elements: Properties of Matter
1. _______________ with a given number of _____________ are called _______________.
2. Scientists have a discovered more than ____________ different elements.
3. How many protons does each element have?
Lithium __________
Helium __________
Hydrogen __________.
4. Adding a neutron to hydrogen would make what element?
It would still be ____________ but it would be an ___________ of Hydrogen.
5. An Isotope of an element has the same number of _______________ but a different number of _______________.
6. Where is Helium located on the Periodic Table of elements? (upper right corner or upper left corner)_____________________________
7. Oxygen has _____ protons.
8. Elements classified as _______________ are on the ______________ side of the Periodic Table.
9. Elements on the _______________ side are classified as _______________.
10. The group with helium (He) is called the _______________ ______________
Molecules: Properties of Matter
1. Elements combine to form _______________.
2. The _______________ _______________ of elements is important to understand why elements combine to form molecules.
3. Although the electrons really orbit throughout the “_______________ _______________, the electron orbits can be more easily explained with a “_______________ _______________.â€Â
4. The lowest energy level holds just _____ electrons.
5. The next level can hold up to _____ electrons.
6. The third level can hold up to _____ electrons.
7. Draw a picture of the element helium.
Ippex: The Atom (continued)
8. Oxygen has _____ protons in the nucleus and therefore has _____ electrons around the nucleus producing a net charge of zero.
9. Since oxygen has _____ electrons, it must have _____ electrons in its second energy level.
10. Draw a picture of the element carbon.
11. Another way to draw this type of diagram is to _______________ the filled energy levels, just draw the _______________ energy levels, and stop drawing the “_______________†for the energy levels.
12. Elements are more stable when they have their energy levels ___________.
13. In order to fill their shells, compatible elements tend to _______________ their electrons.
14. The hydrogen atom would like _____ electron to fill its first energy level.
15. The oxygen atom would like 2 more electrons to fill its __________ energy level.
16. What would happen if just two hydrogen atoms came into contact?
17. In a water molecule each hydrogen atom thinks it has _____ electrons filling its outer shell and oxygen feels as though it has _____ electrons filling its outer shell.
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