The decay that causes this change is called radioactive decay
The answer is 1)True for star is often used as a helping verb in the progressive tense
1)Ayer
2)
3)Martes
4)Septiembre
5)Mes
6)Sabado
8)hoy
9)
10)
11)lunes
12)marzo
You can use quizlet Spanish flash cards to help, also Spanish britanica articles.
Hope this helped :)
