Science STAAR

Which value is most likely the number of protons for saturntonium?

• 388

• 219

• 169

• 171

Tags

NGSS.MS-PS1-1

Which statement is a valid conclusion based on the information?

• Saturntonium is nonreactive

• Saturntonium has properties unlike any other element

• Saturntonium is very reactive

• Saturntonium has properties most similar to period 7 metals

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

What information from the table could help the student identify the element?

• Protons

• Neutrons

• Atomic mass

• Valence electrons

Tags

NGSS.MS-PS1-1

Which model represents the most reactive atom?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-1

What element, based on the subatomic particles in the atom, is shown?

• Beryllium

• Helium

• Lithium

• 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

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

• Number of stable isotopes

• Identity

• State of matter

Which statement is NOT accurate describing the element krypton?

• The element has 36 protons

• The element has 48 neutrons

• The element has 6 valence electrons

• The element has properties similar to neon

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

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