Independent Practice 8.5B Science

A student is shown a picture of the atom to the side. What element, based on the subatomic particles in the atom, is shown?

• Beryllium

• Lithium

• Helium

• Oxygen

Tags

NGSS.MS-PS1-1

Which of the following characteristics is similar for fluorine and iodine?

• Number of Protons

• Number of Neutrons

• Number of Orbitals

• Number of Valence Electrons

 

What element contains 7 protons and 5 valence electrons?

• Boron

• Vanadium

• Nitrogen

• Lithium

Tags

NGSS.MS-PS1-1

The atomic number of an element is equal to its number of protons. Therefore, a logical conclusion is that the number of protons determines an element’s-

• Mass and atomic weight.

• The number of stable isotopes.

• Identity

• State of matter

Which statement would be most helpful in identifying an element?

• The element has 36 protons

• The element has 6 neutrons

• The element has 8 valence electrons

• The element has properties similar to nitrogen

Tags

NGSS.MS-PS1-1

Which statement would be most helpful in determining an element’s reactivity?

• The element has the same number of electron shells as iodine

• The element has the same number of valence electrons as cesium

• The element has 47 neutrons

• The element is a metal

Two students debate the number of valence electrons in an atom of sulfur. Which tool would be most helpful in obtaining this information.

• Scale

• Periodic table

• Microscope

• Dichotomous key

The valence electrons model shown is used by middle school students to help master the concept of determining the number of valence electrons for an element. Each student is provided with a different element card and bingo chips to map the electron configuration of an element. Where are valence electrons located on the model?

• Near the nucleus

• In the middle of the atom

• At the innermost level

• At the outermost level

Tags

NGSS.MS-PS1-1

Not all elements occur naturally. Some are created in a lab setting. It is important to address chemical reactivity hazards prior to an experiment. Such things as chemical splash goggles, aprons, and gloves should be available and used when conducting experiments. The use of this type of safety equipment is known as-

• Preventative safety

• Preventative hazard

• Caution awareness

• Caution procedures

Tags

NGSS.HS-ETS1-3

Compare the data shown in the table. What reasonable conclusion can be made from the information given?

• Element 1 has the same atomic mass as Element 4

• Element 3 has a very similar chemical properties as Element 4

• Element 1 has very similar chemical properties as Element 3

• None of the above

Tags

NGSS.MS-PS1-1