Answer This Question Hurry Lab Report

Physical Properties

It’s time to complete your Lab Report. Save the lab to your computer with the correct unit number, lab name, and your name at the end of the file name (e. g., U2_ Lab_PhysicalProperties_Alice_Jones. doc).

Introduction

1. What was the purpose of the experiment?

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2. Which properties are more useful in determining the identity of an unknown substance: intensive or extensive? Explain.

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3. Write a hypothesis based on observations and scientific principles.

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Experimental Methods

1. What tools did you use to collect your data?

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2. Describe the procedure that you followed to conduct your experiment.

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Data and Observations

1. Record your observations.

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Conclusions

1. What conclusions ca

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.

d

explanation: