Question:

Science .. Please hep me thanks?

by  |  earlier

0 LIKES UnLike

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 “_______________ _______________.”

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.

 Tags:

   Report

2 ANSWERS


  1. i feel that you copied your book! didn't you?


  2. part of learning is where to find the info.. GO READ...

Question Stats

Latest activity: earlier.
This question has 2 answers.

BECOME A GUIDE

Share your knowledge and help people by answering questions.