In Shemos 3:6, the passuk says:
"וַיֹּאמֶר אָנֹכִי אֱלֹהֵי אָבִיךָ אֱלֹקי אַבְרָהָם אֱלֹקי יִצְחָק וֵאלֹקי יַעֲקֹב וַיַּסְתֵּר מֹשֶׁה פָּנָיו כִּי יָרֵא מֵהַבִּיט אֶל־הָאֱלֹקים׃"
"I am,” He said, “the God of your father, the God of Abraham, the God of Isaac, and the God of Jacob.” And Moses hid his face, for he was afraid to look at God. "
In Shemos 3:16, the passuk says:
לֵךְ וְאָסַפְתָּ אֶת־זִקְנֵי יִשְׂרָאֵל וְאָמַרְתָּ אֲלֵהֶם ה' אֱלֹקי אֲבֹתֵיכֶם נִרְאָה אֵלַי אֱלֹקי אַבְרָהָם יִצְחָק וְיַעֲקֹב לֵאמֹר פָּקֹד פָּקַדְתִּי אֶתְכֶם וְאֶת־הֶעָשׂוּי לָכֶם בְּמִצְרָיִם׃
Go and assemble the elders of Israel and say to them: the LORD, the God of your fathers, the God of Abraham, Isaac, and Jacob, has appeared to me and said, ‘I have taken note of you and of what is being done to you in Egypt.
Why is it in passuk 6 the Torah has the word "Elokei" before each name, whereas in 16, it doesn't?