Answer:
C po
Explanation:
baka po pero pwd din ang B pero ok ang C
The correct answers would be A, and D
Kr= krypton
K= potassium
C=carbon
En= neon
Si= silicon
Au= gold
Ni= nitrogen
Br= berillium
Mg=magnesium
Mn= mangenese
Al: aluminum
Answer:
B
Explanation:
Noble gases are in group 18 (neon, argon, etc)
A. the density stays the same unless given an external catalyst