CK-12 Physical Science Concepts - For Middle School

2.47. Metals http://www.ck12.org 2.47 Metals Identify the metals class of elements. Describe properties of metals. Explain why ...

http://www.ck12.org Chapter 2. Matter Properties of Metals Elements in the same class share certain basic similarities. In addit ...

2.47. Metals http://www.ck12.org Summary Metals are elements that can conduct electricity. Most elements are metals. All metals ...

http://www.ck12.org Chapter 2. Matter 2.48 Nonmetals Identify the nonmetals class of elements. List properties of nonmetals. Ex ...

2.48. Nonmetals http://www.ck12.org TABLE2.10:(continued) Illustration Property Most nonmetals are poor conductors of heat. In f ...

http://www.ck12.org Chapter 2. Matter is already very stable and never reacts with other elements. It neither accepts nor gives ...

2.48. Nonmetals http://www.ck12.org What is the outcome of the experiment? Based on this outcome, what conclusion can you draw? ...

http://www.ck12.org Chapter 2. Matter 2.49 Metalloids Identify the metalloids class of elements. List physical properties of me ...

2.49. Metalloids http://www.ck12.org energy level (arsenic, antimony, and tellurium) tend to act like nonmetals by gaining elect ...

http://www.ck12.org Chapter 2. Matter Metalloids tend to be shiny like metals but brittle like nonmetals. Because they are britt ...

2.49. Metalloids http://www.ck12.org Which physical property of metalloids is like that of nonmetals? Explain the variation in ...

http://www.ck12.org Chapter 2. Matter 2.50 Valence Electrons Define valence electron. Show how to represent valence electrons w ...

2.50. Valence Electrons http://www.ck12.org Electron Dot Diagrams Because valence electrons are so important, atoms are often re ...

http://www.ck12.org Chapter 2. Matter FIGURE 2.97 compound named sodium chloride (NaCl). It forms when an atom of sodium (Na) gi ...

2.50. Valence Electrons http://www.ck12.org FIGURE 2.98 FIGURE 2.99 Table salt (sodium chloride). FIGURE 2.100 17. Q:Find calciu ...

http://www.ck12.org Chapter 2. Matter A:Calcium is a group 2 element with two valence electrons. Therefore, it is very reactive ...

2.50. Valence Electrons http://www.ck12.org Vocabulary valence electron: Electron in the outer energy level of an atom that is ...

http://www.ck12.org Chapter 2. Matter 2.51 Hydrogen and Alkali Metals Identify the elements in group 1 of the periodic table. E ...

2.51. Hydrogen and Alkali Metals http://www.ck12.org Reactivity of Group 1 Elements Hydrogen is a very reactive gas, and the alk ...

http://www.ck12.org Chapter 2. Matter Other Properties of Alkali Metals Besides being very reactive, alkali metals share a numbe ...