Periodic Table Trends

According Ms. Lockridge, the greatest, most beautiful gift to SCIENCE is....

• Ms. Lockridge's grandson

• The periodic table

• HCPA's Chemistry Class

• Edpuzzle

• Penicillin

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What are the radioactive elements with atomic numbers from 90 to 103 called?

• • the noble gases

• • the alkali metals

• • the actinides

• • alkaline earth metals

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Which elements are found in the transition metals family? [Choose two.]

• Gold (Au)

• Helium (He)

• Iron (Fe)

• Uranium (92)

Match the following

• (-) charge located outside the nuclues

• neutron

• no charge, located in the nucleus

• electron

• (+) charge, located in the nucleus

• proton

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How are an element's valence electrons different from other electrons? 

• • They are larger than other electrons.

• • They are located in the outer energy shell (ring/level).

• • They are smaller than other electrons.

On the periodic table as you go across a period, from left to right, the number of protons ​ ​ and the atomic mass ​ will both_____.

• increase

• decrease

• stays the same

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What is the mass number of the element Germanium (Ge)

with 32 protons, 34 neutrons, and 36 electrons? 

• 66

• 32

• 34

• 36

Potassium [K #19] has ​​ ​

energy shell(s).​

• 4
• 1
• 19

When a neutral atom GAINS an ​electron it becomes ___ .

• negative
• neutral
• positive

An atom with a positive charge (Na+) is called a ____.

• anion

• proton
• cation

• positive