science 11

1. What are valence electrons? 

• 
  The electrons in the outermost shell of an atom that participate in chemical bonding.

• the electrons in the innermost shell of an atom that participates in chemical bonding

• the atoms in the outermost shell of an electron that participate in chemical bonding

• the atoms in a shell of a nucleus

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which electrons have higher energy levels? Electrons further from the nucleus or closer to the nucleus? 

1. How many valence electrons does a neutral atom of  hydrogen have? 

• 3

• 6

• 1

• none

How many valence electrons does carbon have?

1. What is the maximum number of covalent bonds an atom of carbon form?   

• 6

• 8

• 10

• 4

Ionic bonds form between what two types of elements?

Covalent bonds form between what types of elements?

• metals

• non metals

• negative elements

• positive elements

Why are the elements in group 18 stable? (pick the definition )

• Because their outermost electron shell is full and are therefore unable to form chemical bonds.

• study

How many atoms of carbon are in a molecule of CO2?

Tags

NGSS.MS-PS1-1

How many atoms of hydrogen are in a molecule of H2O?

• 2

• 5

• 8

• 1

Tags

NGSS.MS-PS1-1