Chemistry Homework #4

Which element has the electronic configuration 2.8.2 ?

• fluorine

• hydrogen

• magnesium

• sulfur

Tags

NGSS.HS-PS1-1

How many electrons per shell does calcium have?

• 2,8,8,2

• 2,8,10

• 2,8,2,8

• 2,1,8,2

Tags

NGSS.MS-PS1-1

Which element has an electron configuration of 2.8.8?

• Lead
• Flourine
• Neon
• Argon

Tags

NGSS.HS-PS1-1

What is the electron configuration of Aluminium?

• 2.8.3
• 2.11
• 13
• 2.8.2

Tags

NGSS.HS-PS1-1

Valence electrons are electrons in the shell

• furthest from the nucleus

• closest to the nucleus

• having the lowest energy level

• that has the fastest electrons

Choose the correct number of valence electrons for Barium

• 1

• 2

• 3

• 4

How many valence electrons in Oxygen?

• 5

• 6

• 7

• 8

Ions are

• atoms that have gained or lost a proton

• atoms that have gained or lost a neutron

• atoms that have gained or lost an electron

• any atom

Cations have a __________ charge, anions have a _____________ charge.

• positive, negative

• negative, positive

• negative, neutral

• neutral, positive

What is an anion's charge?

• positive

• negative

• neutral

• depends on the element's charge