Radioactivity and discovery years (91–100)

Question 1

Neptunium (Z=93) — year of discovery and naturally occurring or synthetic?

Accepted Answer

1940 — synthetic

Question 2

Americium (Z=95) — year of discovery and naturally occurring or synthetic?

Accepted Answer

1944 — synthetic

Question 3

Uranium (Z=92) — year of discovery and naturally occurring or synthetic?

Accepted Answer

1789 — naturally occurring

Question 4

Plutonium (Z=94) — year of discovery and naturally occurring or synthetic?

Accepted Answer

1940 — synthetic

Question 5

Einsteinium (Z=99) — year of discovery and naturally occurring or synthetic?

Accepted Answer

1952 — synthetic

Question 6

Protactinium (Z=91) — year of discovery and naturally occurring or synthetic?

Accepted Answer

1913 — naturally occurring

Question 7

Berkelium (Z=97) — year of discovery and naturally occurring or synthetic?

Accepted Answer

1949 — synthetic

Question 8

Curium (Z=96) — year of discovery and naturally occurring or synthetic?

Accepted Answer

1944 — synthetic

Question 9

Fermium (Z=100) — year of discovery and naturally occurring or synthetic?

Accepted Answer

1952 — synthetic

Question 10

Californium (Z=98) — year of discovery and naturally occurring or synthetic?

Accepted Answer

1950 — synthetic

Radioactivity and discovery years (91–100): Type-in