positive ions and gases

How do the following two elements bond together?
K¹⁺  S^2- 

• KS
• K₈S
• K₆S₃
• K₂S

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

If magnesium and HCl(aq) react to form H₂(g), and a burning splint placed in the gas produces a popping sound, this is a

• negative test

• positive test

• conclusion

• observation

Sodium

• red

• orange

• yellow

• green

Lithium Flame Test?

• red

• orange

• yellow

• green

Metal ion with a lilac flame

• Na⁺
• K⁺
• Na²⁺
• K²⁺

Ions are: 

• atoms with a positive or negative charge
• atoms with no charge
• atoms with ONLY a positive charge
• atoms with ONLY a negative charge

Cations are...

• Positive

• Negative

• Neutral

• Purring

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

An atom becomes _______ when it loses electrons.

• Positive

• Negative

• Neutral

• Invinsible

What type of ions do metals form?

• cations

• anions

Which of the following would pairs would give the same flame test results?

• NaCl & MgCl₂

• LiCl & LiBr

• CaCO₃ and MgCO₃

• H₂O and HCl