February 2019 1 8 Report
1. Di antara zat berikut yang merupakan senyawa adalah....
a. air sungai
b. Urea
c. kuningan
d. udara
e. batu

2. Jika diketahui unsur 11 23 , maka jumlah elektron, proton dan neutron adalah....
a. 23 proton, 12 elektron, 11 neutron
b. 11 proton, 12 elektron, 23 neutron
c. 11 proton, 11 elektron, 12 neutron
d. 11 proton, 12 elektron, 11 neutron
e. 12 proton, 11 elektron, 11 neutron
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