Using the State Curriculum: Science, Grade 8

Clarifications: Each clarification provides an explanation of an indicator/objective to help teachers better understand the skills and/or concepts.

Standard 4.0 Chemistry

Topic A. Structure of Matter

Indicator 1. Provide evidence to explain how compounds are produced. (No electron transfer)

Objective c. Based on data from investigations and research compare the properties of compounds with those of the elements from which they are made.

Clarification

The data table below compares the properties of three compounds and compares them with the properties of the elements from which each is made. Properties for comparison include color, state of matter at room temperature and melting point.

PROPERTIES OF ELEMENTS AND COMPOUNDS
Elements	Compounds
Na (Sodium) Silvery White Solid, at room temperature Melting Point: 370.87 K, 97.72°C	NaCl (Sodium Chloride) White Solid, at room temperature Melting Point: 1738 K, 800°C
Cl (Chlorine) Yellowish-greenish Gas, at room temperature Melting Point: 172.31 K, -100.98°C
H (Hydrogen) Colorless Gas, at room temperature Melting Point: 14.00 K, -259.14°C	H₂O (Water) Colorless Liquid, at room temperature Melting Point: 273.15 K, 0°C
O (Oxygen) Colorless Gas, at room temperature Melting Point: 54.36 K, -218.79°C
C (Carbon) Black (graphite) or colorless (diamond) Solid, at room temperature Melting Point: 3773.15 K, 3500°C	CO₂ (Carbon Dioxide) Colorless Gas, at room temperature Melting Point: 216 K, -57°C
O (Oxygen) Colorless Gas, at room temperature Melting Point: 54.36 K, -218.79°C

/toolkit/vsc/clarification/science/grade8/4A1c.xml

Resources for Objective 4.A.1.c:
CLARIFICATIONS | Public Release Items |

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