by Thoeun Bun

Cornell Notes Chapter 4 Lesson 3

tbun — 2015-11-17 16:41:45 UTC

Due by Thursday

table 2 GK LM

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4: number of neutrons=mass number - number of protons

Table 3 Brandon & Deniko

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#5 Q: What is an isotope? A: atoms of the same element that contain different numbers of neutrons

#6 Q: How many isotopes does carbon have? A: 3

table 1 JH & HF

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#1: An element is a pure substance made from atoms that all have the same number of protons. There are 118 known elements.

table 1 N$H

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neutrons

Table 6 Jacqueline&KK

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An Ion becomes positive when it loses an Electron. It is shown by a superscript plus sign (+). Example: Ca+

7 dylan lexi savanah

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#13 what are negative ions?

when an atom gains an electron,it forms an ion with an negative charge.

#14 provide example of negative ions?

fluorine and chlorine can form ions with a -1 charge.

Table 6 Grace & Trinity

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#12 Elements on the left side of the periodic table are most likely to form positive ions. In group 1, Lithium, sodium, and potassium are likely to lose one electron. Elements in group 2, beryllium, magnesium, and calcium commonly lose 2 electrons

table 4 Donovan lena

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#7 Which isotopes of carbon is the most radioactive it's a isotope is the most radioactive #8

Table 5 (Nick W, Conner, Oscar)

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9.) What are the isotopes of hydrogen. List them.

- Protium

- Deuterium

- Tritium

10.) What is an Ion?

- An Ion is an atom that has gained or lost electrons and is no longer neutral.

TABLE 2 BR NC

200620540 — 2015-11-17 17:00:45 UTC