Element's Identity and Valence Electrons

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

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

Four students were asked to name the parts of an atom that determine the atom’s identity and chemical properties. The students’ responses are shown in the table below. Which student’s responses are correct?

• Student 1

• Student 2

• Student 3

• Student 4

Tags

NGSS.MS-PS1-1

The atoms of a certain element each contain 11 protons and 1 valence electron. Which statement correctly identifies this element and describes its chemical reactivity?

• The element is fluorine, and it is not very reactive.

• The element is sodium, and it is not very reactive.

• The element is sodium, and it is highly reactive.

• The element is fluorine, and it is highly reactive.

What information is true about Hydrogen (H)?

• Group 1

  1 valence electron

  1+ charge

• Group 1

  1 valence electron

  1- charge

• Group 2

  2 valence electrons

  2+ charge

• Group 2

  2 valence electrons,

  2- charge

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

What information is true about Magnesium (Mg)?

• Group 2

  2 valence electrons

  2+ charge

• Group 2

  2 valence electrons

  2- charge

• Group 15

  5 valence electrons

  5+ charge

• Group 15

  5 valence electrons

  3- charge

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What information is true about Aluminum (Al)?

• Group 13

  3 valence electrons

  3+ charge

• Group 13

  3 valence electrons

  3- charge

• Group 15

  5 valence electrons

  3- charge

• Group 15

  5 valence electrons

  3+ charge

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-4

What information is true about Oxygen (O)?

• Group 16

  6 valence electrons

  2- charge

• Group 16

  6 valence electrons

  6+ charge

• Group 16

  6 valence electrons

  2+ charge

• Group 16

  6 valence electrons

  6- charge

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-4

What information is true about Nitrogen (N)?

• Group 1

  1 valence electron

  1+ charge

• Group 1

  1 valence electron

  1- charge

• Group 15

  5 valence electrons

  5+ charge

• Group 15

  5 valence electrons

  3- charge

Tags

NGSS.MS-PS1-1