Periodic Table (8.5C) STAAR Practice

What do all elements in a period on the Periodic Table have in common?

• Number of valence electrons

• Number of energy levels

• Atomic Numbers

• Atomic Masses

A scientist performs tests on a sample of an element. The element is a shiny solid that conducts electricity and heat. The scientist is able to bend and flatten the sample when pressure is applied to it.

Based on this information, the element could NOT be a member of which group on the periodic table?

• Group 2

• Group 8

• Group 12

• Group 18

How many valence electrons are in an atom of each element in Group 15 in the periodic table?

• 5

• 15

• 7

• 1

Tags

NGSS.MS-PS1-1

Students were asked to identify the location of elements in the periodic table based on clues printed on game cards.

Based on the data, which periodic table shows the correct location of the four elements?

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Tags

NGSS.MS-PS1-2

Element R and Element Q have the same number of valence electrons. These elements both have similar chemical properties, but Element R has fewer energy levels than Element Q.

Which statement best describes the positions of the two elements in the periodic table?

• The two elements are in the same period, with Element R the first element in the period and Element Q the last element

• The two elements are side by side in the same period, with Element Q to the left of Element R

• The two elements are in the same group, with Element R just above Element Q

• The two elements are in the same group, with Element Q at the top of the group and Element R at the bottom

Students in a science class prepared flash cards so that they could quiz one another about the arrangement of the periodic table. One of the flash cards contained information about two elements, Element L and Element M.

The students had to use the information on the flash card to determine the possible positions of the two elements on a blank periodic table. Which periodic table has the elements placed in location that match the information on the flash card?

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Tags

NGSS.MS-PS1-1

The periodic table is organized into groups and periods of elements. The characteristics of a certain group of elements are listed in the picture.

Which of these elements is in this group?

• Lithium

• Strontium

• Aluminum

• Silicon

Which two elements on the periodic table are in the same period?

• Sn and Rb

• F and Cl

• K and Ba

• Se and Te

A researcher wants to experiment with an element that reacts like phosphorus (P) but has a greater atomic mass. Which element should the researcher select for the experiment?

• Nitrogen (N)

• Sulfur (S)

• Arsenic (As)

• Silicon (Si)

Tags

NGSS.MS-PS1-2

A Bohr model of a stable Gallium (Ga) should have _____ valence electrons and _____ energy levels.

• 1; 3

• 2; 4

• 3; 4

• 4; 3

Tags

NGSS.MS-PS1-1