The answers is A. Reales energy stored in chemical bonds
Answer:
1) Ductile
2) Malleable
please mark brainlest if right
Explanation:
Answer:
The answer is barium phosphate
B. 11,540
<h3>Further explanation
</h3>
The atomic nucleus can experience decay into 2 particles or more due to the instability of its atomic nucleus.
Usually radioactive elements have an unstable atomic nucleus.
General formulas used in decay:
![\large{\boxed{\bold{N_t=N_0(\dfrac{1}{2})^{t/t\frac{1}{2} }}}](https://tex.z-dn.net/?f=%5Clarge%7B%5Cboxed%7B%5Cbold%7BN_t%3DN_0%28%5Cdfrac%7B1%7D%7B2%7D%29%5E%7Bt%2Ft%5Cfrac%7B1%7D%7B2%7D%20%7D%7D%7D)
T = duration of decay
t 1/2 = half-life
N₀ = the number of initial radioactive atoms
Nt = the number of radioactive atoms left after decaying during T time
Nt=25 g
No=100 g
t1/2=5770 years
![\tt 25=100\dfrac{1}{2}^{T/5770}\\\\\dfrac{1}{4}=\dfrac{1}{2}^{T/5770}\\\\2=T/5770\rightarrowT=11540~years](https://tex.z-dn.net/?f=%5Ctt%2025%3D100%5Cdfrac%7B1%7D%7B2%7D%5E%7BT%2F5770%7D%5C%5C%5C%5C%5Cdfrac%7B1%7D%7B4%7D%3D%5Cdfrac%7B1%7D%7B2%7D%5E%7BT%2F5770%7D%5C%5C%5C%5C2%3DT%2F5770%5CrightarrowT%3D11540~years)