金属元素＆金属元素→＿＿結合

金属元素＆非金属元素→＿＿結合

非金属元素＆非金属元素→＿＿結合

Optimized studying based on the forgetting curve vastly improves memorization. - What is reminDO?

Memorize 18

Evagreen

𝕏

Flag post / Block

• Register
• Sign up
  

• Sign in
• Twitter

  Facebook

  Google
  ID or E-mail address:

  password:

  Sign in
  
  Forgot Password